Associations between motor, sensory and structural lateralisation and guide dog success

The aim of this study was to determine whether objective measures of laterality could be used to identify dogs with a high probability of successfully completing a Guide Dog Training Programme. Three categories of laterality (motor, sensory, and structural), were assessed in 114 dogs entering guide dog training. Significant predictors of success were identified: the direction of laterality (P=0.028), paw preference category in the 'Kong' test (P=0.043), hindpaw clearance height (P=0.002), laterality indices for a number of measures in the Sensory Jump test, and chest hair whorl direction (P=0.050). This is the first study to report a structural marker of canine behaviour. All three categories of laterality may be used to predict the suitability of dogs for guiding work, and by identifying predictors of success, resources can be more efficiently utilised on dogs with greater potential.     

Evaluation of the potential suitability of guide dog candidates by continuous observation during training

Periodic monitoring of the training of prospective guide dogs for the blind was evaluated to determine if the monitoring is useful in gauging the potential suitability of guide dogs. We selected 8 dogs as test dogs on the basis of their medical check and pretraining evaluation. Beginning with day 1 of training, we monitored their progress every 2 weeks for 12 weeks. The evaluation was designed to assess task performance, stress, excitement, and concentration for the task. We set the test course in a residential district, but in an area that was not used for daily training. In some variables, such as tail position, duration of distraction, and effect of the training break, there were some differences between a dog that successfully completed guide training and dogs that did not.The number of stress reactions was significantly different between successful and unsuccessful dogs. Only 1 dog out of the 8 observed became a guide dog; however, the present study suggests that it is possible to detect some traits in the early stages of training that determine whether or not a dog successfully becomes a guide dog.     

Factors associated with success in guide dog training

Tests of motor laterality and behavioral reactivity, as well as salivary cortisol concentrations, were examined in this pilot study to identify dogs best suited to guide dog work. Over a 14-month period, lateralization tests were conducted and cortisol concentrations were determined on 3 separate occasions, and temperament testing was performed on 2. Potential guide dogs (N = 43) involved in this study were 5 golden retrievers (4 males, 1 female) and thirty-eight Labrador retrievers (8 black males, fifteen yellow males, 5 black females, and ten yellow females). Results from these tests were then compared with the ultimate success of the dogs in the Guide Dogs NSW/ACT training program. This comparison produced evidence that motor lateralization (particularly the rate at which both paws were used during the Kong Test and the lateralization index during the Tape Test), reactions to an unfamiliar dog, the latency for dogs to drop and rest during an uninterrupted period, and the dog's color and breed were predictive of ultimate success. This study also identified 14 months of age as a more accurate time to assess dogs for these traits than either 6 months of age or at the age at which they completed their training (ranging from 14 to 20 months of age).     

The effects of structured sessions for juvenile training and socialization on guide dog success and puppy-raiser participation

This study examined 60 juvenile Labrador (LR) and golden retrievers (GR) and their puppy raisers (PR) to determine the effect of training (n = 20) and socialization (n = 20) compared with a control group (n = 20). These potential guide dogs were randomly allocated into 3 groups of 20 (2 treatment groups and 1 control). Training sessions ran for 6 weeks (only 5 of which were attended by the dogs), and socialization groups ran for 5 weeks (all of which were attended by the dogs). Training involved teaching a bridge (clicker); basic obedience behaviors including sit, drop, loose-leash walking, and recalls; as well as desensitization to handling, discussions about anxiety and environmental enrichment, and play time. Socialization classes covered the same discursive material, but without the training and bridge components. The control group comprised other pups and their PRs within the guide dog puppy-raising program but who were not given access to these additional classes. Like the dogs in both the treatments, these control dogs also underwent the Guide Dog NSW/ACT program but received no direct intervention through the current study.The authors hypothesized that training and socialization would improve the success rates of dogs in the guide dog program. However, the treatments did not influence the rate of success nor the likelihood of PRs raising a subsequent pup. The interaction between color and sex had some effect on success rates; yellow female LRs had the greatest chance of success, and female GRs had the lowest chance of success. This difference may warrant further investigation in a broader study to assist in decisions as to which breeds and sexes are most successful in guide dog organizations.     

Relationships between puppy management practices and reported measures of success in guide dog training

This study surveyed international guide dog organizations to compare their success rates with management practices. A questionnaire designed to identify the factors associated with international guide dog success was piloted with the cooperation of Guide Dogs NSW/ACT. The International Guide Dog Federation endorsed the study before the questionnaire was sent to 76 of its member organizations from 27 countries. There were 38 responses (of which 36 were usable) from guide dog organizations in 15 countries (50% response rate). Guide dog success rates were defined by the dogs' graduating success (the proportion of dogs commencing the program that successfully graduated as guide dogs) as well as working success (the proportion of dogs commencing the program that were working 1 year later). Working success and graduating success were found to be significantly different. Working success was considered the more informative estimate of true success, as it incorporated more variables than did graduating success.Quotas were used by many organizations to ensure that dogs graduated in sufficient numbers to meet the demand from visually impaired clientele. Despite our hypothesis that quotas would artificially inflate graduating success rates, logistic regression found that they were not associated with differences in graduating success rates, but that they were associated with greater working success. This finding indicates that quotas are not set at unrealistic levels and may help improve long-term success rates. Logistic regression also showed that dog breeds, the application of different temperament tests, the use of external breeders (as opposed to the organization breeding their own dogs), and the methods used to acquire information about the dogs during the puppy-raising period were significantly associated with these outcomes.     

A practitioner's guide to working dog welfare

Research conducted by the Anthrozoology Institute and the Defence Science and Technology Laboratory has shown that many working dogs exhibit high levels of physiologic stress in response to kenneling (Hiby et al., 2006, Rooney et al., 2007a). Furthermore, these dogs tend to perform poorly during training, establishing links between welfare and working ability (Rooney et al., 2005, Rooney et al., 2007b). Subsequently, we have been studying how kenneling affects welfare and working ability. Specifically, we have investigated which elements within housing and husbandry influence welfare, which of these seem to be the most important, and how environmental enrichment (e.g. feeding devices) can affect welfare and working ability. This paper draws together results from all of these studies, identifying signs that may be indicative of compromised welfare, and providing guidelines, based on scientific evidence, for how to improve kenneled working dog welfare. It reproduces an unpublished guide designed to primarily inform and advise practitioners who are responsible for caring for, and/or handling working dogs. This paper aims to ensure that practitioners are updated of the most recent advances in working dog welfare, and hence many of the studies summarized here are yet to be published in full, in peer-reviewed journals.     

A vitamin e response in a young dog

Extract

This subject will be covered in three sections, first, a brief history of how the idea of using trained dogs to help the blind was conceived, then the present-day methods of training guide dogs, and, finally, how the blind person is trained with their guide dog to work together as a team.     

The suitability of dogs as guide dogs for the blind: criteria and testing procedures

Criteria and testing procedures with regard to the suitability of dogs as guide dogs for the blind were developed on the basis of a literature study and own observations. A profile of the guide dog comprising physical characteristics, skillfulness, behaviour, and obedience was drawn up. As a rule, the testing procedures concern health and skills of the dogs. In the skill test some elements of the behavioural and obedience test were included. The final evaluation is based on the results of physical examination and the skill test, unless testing of behaviour and/or obedience appears necessary as well. A method for evaluating the performance of the dogs as objectively as possible is described. Some implications of using and testing guide dogs are discussed.     

Preliminary study of the impact of different dog features on humans in public

Revealing why pedestrians are afraid of some dogs while passing them in public is essential to assess the dog–owner–stranger relationship. Therefore, the effect of different dog features on passersby was gathered. Four dog features differing in size and color were investigated. The dog features were classified as small-dark, small-pale, large-dark, and large-pale. Dog's effect on passersby was recorded in 2 ways: (1) observing the behavioral responses of passersby while passing nearby a dog, and (2) revealing the passersby's perception of that dog by a short interview. Direct observations of 427 passersby's behavioral responses while passing a dog on a sideway were acquired, and 126 persons were interviewed. It was suggested that large-dark dogs seemed to be more threatening than pale or small dogs. Passersby confronted with pale dogs of equal size changed their way far less than when confronted with dark dogs. Significant differences were noted for the type of effect assessed and the reason for this behavioral response. The results showed that only the small-pale dog appeared to be friendly because of its size (P = 0.000). All other dogs were stated as friendly because of individual factors including breed and own dog experiences (P = 0.000). None of the dogs were mentioned as threatening. Our results show that some dog features have a significant effect on behavioral responses and the subjective perception of dogs by people in public.     

Relationship between management factors and dog behavior in a sample of Argentine Dogos in Italy

Owners' husbandry choices may affect the expression of dogs' behavior. In this study, the relationship management-behavior was explored in 181 Argentine Dogos owned by 94 dog owners who answered 35 Yes/No questions on their dogs' behavior (e.g., obedience, aggression, and fear) and 10 single-choice questions on dogs' husbandry. The association management-behavior was explored with χ². Kennel-living dogs were more aggressive than house-living ones (food protection, P = 0.017; owner-directed aggression, P = 0.050; stranger-directed aggression, P = 0.031; same-sex dog aggression, P = 0.028), whereas the latter were more obedient (P < 0.001), destructive (P = 0.048) and friendly with people (P = 0.002) and dogs (P < 0.001). Physical punishment was associated with food protection (P = 0.023) and owner-directed aggression (P = 0.026). Dog-showing was inversely associated with pulling on the leash (P = 0.007), and fears of environmental stimuli (i.e., traffic, P = 0.001; startling stimuli, P = 0.031; loud noises, P = 0.018). Frequent play sessions were negatively related to fear of startling stimuli (P = 0.039) and positively to obedience (P < 0.001) and friendliness toward strangers (P = 0.004). Short daily walks were associated with fears of environmental stimuli (startling stimuli, P < 0.001; loud noises, P = 0.033), destructiveness (P = 0.054), low concentration (P = 0.025) and poor results in training sessions (P < 0.001). Obedience training was positively associated with obedience (P < 0.001), mounting people (P = 0.003), aggression to handling (P = 0.002) and food removal (P = 0.041). Without establishing cause–effect relationships between management and behavior, this survey highlights husbandry aspects that need careful evaluation because there are associated with undesirable behaviors (e.g., kennel living) and aspects that may reduce problem behaviors (e.g., daily walks, play sessions, dog shows).     

Trichinosis in a dog

Trichinella spiralis infection was identified by direct fecal examination as the cause of gastrointestinal disease in a dog. The source of infection was believed to be a woodchuck. Management included supportive care and benzimidazole treatment. Vomiting, diarrhea, anorexia, and myalgia are the main signs of trichinosis, but routine fecal examination seldom reveals T spiralis in natural infections. Mebendazole is the recommended anthelmintic and should be used to eliminate intestinal larvae and prevent muscle invasion. Although the prevalence of trichinosis is decreasing in swine, wild mammals may still be a potential source for dogs and cats. Nevertheless, because of the nonspecific clinical signs of trichinosis, many cases probably go undiagnosed.     

Canine behavioral problems and their effect on relinquishment of the Jindo dog

The purpose of this study was to evaluate behavior problems of the Jindo dog, the native dog of Korea, based on an owner''s survey and their effect on pet relinquishment. To live a better life with their own pet and prevent relinquishment, it is important to understand the innate behavior characteristics of dog breed and the potential causes of relinquishment. Information concerning various factors and demonstration of the five most common behavior problems was collected via 189 completed questionnaires. No factors significantly affected the demonstration of behavior problem. A total 151 of 189 dogs had behavior problems (79.9%) and 38 dogs did not have behavior problems (20.1%). Among 151 dogs, 139 dogs showed single behavior problem (92.1%). They were ''excessive excitability'' (46.8%), ''excessive vocalization'' (30.2%), ''inappropriate elimination'' (17.3%), ''destructive behavior'' (4.3%), and ''aggressive behavior'' (1.4%), respectively. In addition, 12 dogs showed two concurrent behavior problems (7.9%) According to the results, the relinquishment of Jindo dogs was not significantly associated with canine behavior problems, which is the single greatest risk factor of relinquishment in general. The possible reasons for potential behavior problems include improper raising, lack of socialization, and insufficient dog training classes, therefore canine behavior would be improved by owner education.     

Factors affecting the success of rehoming dogs in the UK during 2005

In the UK, welfare organisations care for several thousand dogs each year. The successful rehoming of these dogs is a difficult process resulting in some of them being returned to rehoming centres. There have been very few studies examining the underlying mechanisms in the UK. Therefore, this study was conducted to determine those factors which affect the success of rehoming dogs.A prospective cohort study was conducted using a sample of 5750 dogs rehomed by Dogs Trust, a UK based dog welfare charity, during 2005. Dogs were followed up for a period of 6 months after adoption to determine if these dogs were still in their placement home. There was a 78% response rate to the follow-up postal questionnaires sent to the new owners, giving information on 4500 owners. Fourteen percent of adoptions failed. The results showed that behavioural problems are an important factor in the success of adoption such that if dogs had shown aggression towards people and the owners had not sought advice, they had 11.1 times the odds (95% CI: 6.6, 18.8) of being returned compared to those dogs without behavioural problems. Attending training classes significantly decreased the chance that the adoption would be unsuccessful (OR 0.3, 95% CI: 0.2, 0.4). It was shown that those owners who found that the effort and work involved in looking after their dog to be more than they had expected, had 9.9 (95% CI: 4.1, 24.6) times the odds of returning their dog than those who found the effort required to be less than they had expected.The results of this study show that there are many factors involved in a successful adoption and it is important that the new owners are informed of what to expect are encouraged to attend training classes and are prepared to work at any behavioural problems that their dog may have.     

Successful management of suspected acorn (Quercus petraea) toxicity in a dog

A 7-year-old neutered male Labrador retriever dog was referred to a tertiary care veterinary hospital because of gastrointestinal signs and icterus. The dog developed a hepatopathy and acute kidney injury after ingesting acorns (Quercus petraea) 4 days prior to referral. The dog required hospitalization in an intensive care unit but made a full clinical recovery and was discharged after 6 days. This report documents that dogs can be affected by this toxicity and highlights the need for veterinarians to consider acorns as a potential cause of acute hepatotoxicity and renal injury. To the authors’ knowledge, this is the first reported case of acorn toxicity in a dog.     

Epidemiology of methicillin resistant Staphylococcus pseudintermedius in guide dogs in Finland

Background

Methicillin resistant Staphylococcus pseudintermedius (MRSP) and Staphylococcus aureus (MRSA) are common multi-drug resistant (MDR) bacteria in dogs. In 2012–2013 three dogs of the Guide Dog School of the Finnish Federation of the Visually Impaired were found to be MRSP positive. Guide dogs have regular contact with each other during their first year of life and prolonged contact when in training. Since dogs are placed in different parts of Finland after training, there is a risk for national spread of MDR bacteria. In this study the prevalence of MRSP and MRSA, as well as the risk factors for MRSP were determined in the Finnish guide dog population. MRSP isolates were investigated using molecular methods and compared to the earlier isolates.

Results

Out of 132 tested dogs 4 were MRSP positive thus giving the prevalence estimate of 3% (95% CI: 1–8%) for MRSP in the target population. MRSA was not detected (prevalence estimate 0%, 95% CI: 0–3%). Risk factors associated with MRSP were being a breeding bitch (OR = 8.4; 95% CI: 1.1–64.1, P = 0.012), the number of veterinary visits (OR = 1.23; 95% CI: 1.0–1.5, P = 0.025) and number of antimicrobial courses (OR = 1.63; 95% CI: 1.0–2.55; P = 0.035). Identified MRSP isolates belonged to five different sequence types (ST45, 71, 402, 403 and 404). All ST71 isolates carried SCCmec II-III, while the SCCmec type of the ST45 and ST402 (a single locus variant of ST45) isolates were non-typeable with the method used.

Conclusions

MRSP and MRSA had low prevalence in the studied dog population despite the close contact between dogs, and the MRSP population was heterogenic. Antimicrobial therapy and veterinary visits are risk factors for MRSP even among a small case group.

Electronic supplementary material

The online version of this article (doi:10.1186/s13028-015-0129-8) contains supplementary material, which is available to authorized users.     

Dangerous dogs in Berlin in comparison to the dog population--ways to reduce the dangerousness of dogs

The law for handling and control of dogs in Berlin of September 29, 2004 was enacted to prevent the risks for humans and animals when ever they have contact with dogs. "Dangerous dogs" are defined by this law. There are 10 breeds of dogs supposed to be dangerous due to specific characteristics of their breed ("listed breeds"). The dangerousness of a dog's breed is not identical with the dangerousness of an individual dog. The subject of this study is to examine the potential dangerousness of dog breeds and not the individual dangerousness of a dog. This study refers to statistics of incidents between dogs and humans in Berlin for the years 1998 to 2004. The population density of a breed is based on the dogs assessed for tax purposes in Berlin of January 1, 2005 and on the dog registrations maintained at veterinary hospitals. The fourfold-table-test was used to compare the quantity of the recorded incidents of two statistically independent dog breeds. Of the total population of 107,804 tax assessed dogs in Berlin in 2004, 0.9% was documented as dogs involved in incidents with humans. The incidents per year decreased in the "listed breeds"about 68% and in the "unlisted breeds" about 41% during the last 7 years in Berlin. Therefore, the probability (the odds ratio) of a breed to be conspicuous was analysed.The values for the calculation of this probability were the number of dogs of a breed having been involved in incidents compared to the population of this breed based on tax records.The comparison of the probability of a breed with another to be conspicuous was used to compile a cluster of breeds which had the same probability to be conspicuous in 2004. A cluster was assessed for dogs of the following breeds: Sheep dogs, Rottweiler, Doberman, Pitbull Terrier and American Staffordshire Terrier. A listing of breeds is not the right way to reduce the potential dangerousness of a dog, especially in the private domain of their owners. Most incidents with dogs occur in the private domain which normally is not recorded in the statistics of incidents. Therefore, it is more effective to support activities which include the training of abilities of the dog owners.Training by experts can enable dog owners to avoid conflict situations with their dog, or in case of conflict, to take appropriate actions.     

Use of a point-of-care urine drug test in a dog to assist in diagnosing barbiturate toxicosis secondary to ingestion of a euthanized carcass

Objective – To describe a case of barbiturate toxicosis in a dog secondary to ingestion of a previously buried euthanized goat carcass and to discuss the utility of urine drug testing in diagnosing barbiturate toxicosis.
Case Summary – A 6-year-old neutered male Border Collie was presented to a university veterinary teaching hospital for evaluation of ataxia and acute collapse. Past pertinent history included Addison's disease that had been managed for 1 year. A companion dog was seen 12 hours earlier chewing on the partially decomposed head of a goat that had been euthanized 47 days previously and buried on the owner's property. The dog was laterally recumbent, unresponsive to stimuli, and hypothermic on physical examination. Initial blood work revealed hyponatremia and hyperkalemia, with a Na/K ratio of 18.5. The dog was volume resuscitated and received an injection of dexamethasone sodium phosphate due to a suspected Addisonian crisis. Despite this treatment, the dog remained laterally recumbent and unresponsive to stimuli. A urine drug screen was performed and was positive for barbiturates. A diagnosis of barbiturate toxicosis secondary to ingestion of a euthanized goat carcass was made. The dog was treated supportively over 12 hours with IV fluids and activated charcoal. The dog was able to walk 11 hours after presentation and was subsequently discharged from the hospital.
New or Unique Information Provided – Urine drug testing is a fast, easy, and point-of-care test that may be useful in dogs to assist in the diagnosis of barbiturate intoxication. Proper disposal of euthanized animals is necessary to prevent toxicosis and possible death of companion animals and wildlife.     

Dirofilaria repens infection in a dog imported to Norway

Dirofilaria repens infection was diagnosed in a dog that had been imported to Norway from Hungary three years previously. The dog was a four-year-old castrated male mixed-breed dog and presented for examination of two masses on the right thoracic wall. Fine needle sampling from the subcutaneous nodules and subsequent cytological examination revealed a high number of microfilariae and a pyogranulomatous inflammation. At re-examination approximately 3 weeks later, both masses had apparently disappeared spontaneously, based on both inspection and palpation. However, examination of peripheral blood by a modified Knott’s test revealed a high number of unsheathed microfilariae with mean length of 360 μm and mean width of 6-7 μm, often with the classic umbrella handle appearance of D. repens. Polymerase chain reaction and sequencing confirmed the D. repens diagnosis. Subcutaneous dirofilariosis caused by D. repens is probably the most common cause of human zoonotic dirofilariosis in Europe, but currently is rarely encountered in northern countries such as Norway. However, travelling, import and relocation of dogs have increased, and thus the geographical range of these parasites is likely to increase from traditionally endemic southern regions. Increasing numbers of autochthonous cases of D. repens infections in dogs have been reported in eastern and central Europe. Although infection with D. repens often induces only mild signs or subclinical infections in dogs, they nevertheless represent a reservoir for zoonotic transmission and thus a public health concern, and, in addition, due to the long prepatent period and the high frequency of subclinical infections or infections with unspecific clinical signs, could easily be missed. Lack of experience and expectation of these parasites may mean that infection is underdiagnosed in veterinary clinics in northern countries. Also, predicted climate changes suggest that conditions in some countries where this infection is currently not endemic are likely to become more suitable for development in the intermediate host, and thus the establishment of the infection in new areas.     

The relationships between motor lateralization,salivary cortisol concentrations and behavior in dogs

The degree of lateralization (LI) indicates both the direction and strength of a paw preference. Here, a positive value is indicative of a right paw bias, and a negative value of a left paw bias. Higher numbers on the positive side of the scale and lower numbers on the negative side of the scale indicate a greater strength of that lateralization. The strength of motor lateralization (|LI|) is the absolute value of the LI. The use of absolute value removes directionality (i.e., does not indicate left or right paw bias) and instead indicates only the strength of the paw preference. Both LI and |LI| have been associated with behavioral differences in a range of species. The assessment of motor lateralization in the dog can be conducted by observing the paw used to perform motor tasks.Elevated cortisol concentrations have been associated with fearfulness in many species. Additionally, fearfulness and boldness can be assessed in response to so-called temperament tests. Consequently, in this study we examine the relationship between lateralization, temperament test results, and cortisol concentrations in 43 potential guide dogs, of which 38 were Labrador retrievers and 5 were golden retrievers.Over a 14-month period, the current study assessed motor lateralization and salivary cortisol concentrations 3 times (approximately 6 months of age, 14 months of age, and after the dogs' performance in the guide dog program had been determined) and behavior twice (approximately 6 and 14 months of age).This study is the first to examine the relationship between behavior, lateralization, and cortisol concentrations in dogs. It implemented an objective and quantifiable assessment of behavior that may be of use to a variety of dog-focused stakeholders.Findings show that during the Juvenile testing period (6 months of age), dogs with higher cortisol concentrations were typically less able to rest when exposed to the unfamiliar testing room. Results from both Juvenile and Adult Test (14 months of age) periods showed that a greater |LI| and LI were associated with more confident and relaxed behavior when dogs were exposed to novel stimuli and unfamiliar environments.Significant elevations of cortisol concentrations were found at the completion of guide dog training when compared with results from the 2 prior test periods. This finding may reflect maturation or the effect of the prolonged kenneling which occurred during this period.