饲喂IgG对仔猪血液生化指标和生产性能的影响

试验分两批选用 12 0 ,6 0头大白仔猪 ,出生 2 4h之内饲喂不同剂量的免疫球蛋白制剂 0 ,4 80 ,96 0mg ,均吮食初乳。于仔猪 5 ,10 ,15日龄前腔静脉采血 ,测定血清总蛋白、血清IgG、血清碱性磷酸酶和血红蛋白含量 ,并测定仔猪断奶时增重 ,哺乳前、后期平均日增重。结果表明 :饲喂不同水平的IgG ,仔猪 5 ,10日龄血清总蛋白、血清碱性磷酸酶活性和血红蛋白含量均显著高于对照组 (P <0 0 5 )。饲喂高水平IgG(96 0mg)的仔猪 ,5日龄血清IgG水平显著高于对照组 (P <0 0 5 )。哺乳前期 (0～ 15日龄 )各处理组仔猪平均日增重显著高对照组 (P <0 0 5 ) ,断奶时增重也显著高于对照组 (P <0 0 5 )。     

饲喂猪血浆IgG对仔猪血液生化指标和平均日增重的影响

本实验分两批选用120头大白仔猪(40,80头),随机分为4组,均食初乳。A组为对照组,其余各组均于出生后24h之内饲喂不同剂量的血浆免疫球蛋白制剂,观察对仔猪5、10、15日龄血清碱性磷酸酶活性、血清IgG浓度和平均日增重的影响。结果表明,饲喂免疫球蛋白制剂900mg的仔猪,其5、10日龄血清碱性磷酸酶活性和5日龄血清IgG浓度显著高于对照组(P<0.05),0-15日龄平均日增重显著高于对照组(P<0.05)。     

注射不同剂量IgG对仔猪生产性能及血液指标的影响

采用辛酸沉淀法从屠宰场收集来的猪血浆中提取IgG，片将提取IgG按不同剂量（0、300、600、900mg／头）静脉注射10窝21日龄仔猪80头（每试验组20头，由每窝选1公1母计2头组成），分别测定不同试验组仔猪平均日增重、腹泻头次、血清碱性磷酸酶活性。结果显示，高剂量IgG（900mg／头）试验组个体21～30日龄平均日增重、22日龄血清总蛋白含量均显著高于对照组（P〈0．05），并能有效降低仔猪腹泻头次。结果表明21日龄仔猪注射900mg猪血IgG能提高仔猪生产性能和免疫机能。     

牛初乳免疫球蛋白对仔猪血清IgG含量和增重的影响

试验选用120头大白仔猪,随机分为3组。A组为对照组,饲喂生理盐水,其余各组均于出生后24 h之内饲喂不同剂量的牛初乳免疫球蛋白制剂,观察对仔猪5、10日龄血清中牛IgG和猪IgG含量以及断奶时增重的影响。结果表明,饲喂牛初乳免疫球蛋白制剂4 g的仔猪,其5、10日龄血清中牛IgG和猪IgG含量显著高于对照组(P<0.05),断奶时增重显著高于对照组(P<0.05)。     

免疫球蛋白制剂对仔猪增重和某些血液指标的影响

本试验选用新生大白仔猪130头，随机分为5组，每组26头。A组为对照组，其余各组饲喂不同剂量的免疫球蛋白制剂。观察对仔猪断奶时的增重和10、20日龄血清总蛋白、血红蛋白含量的影响。结果表明：饲喂10m1(B组)免疫球蛋白制剂的仔猪，其20日龄血清总蛋白含量及10、20日龄血红蛋白含量均极显著高于对照组(P＜0．01)；饲喂10m12次(C组)的仔猪，其10、20日龄血红蛋白含量显著高于对照组(P＜0．05)；B、C组断奶时增重均极显著高于对照组(P＜0．01)。结果显示，10m1免疫球蛋白制剂(48．4mg／ml）为最适添加剂量。     

哺乳仔猪口服牛初乳IgG效果观察

从22窝初生仔猪中选取120头,按品种、体重、性别均匀地分成3个组,24h内分别按0mg、1 000mg、2 000mg剂量灌服牛初乳IgG,测定仔猪21日龄断奶个体重,计算0-21日龄平均日增重,统计仔猪0-21日龄腹泻发病率和死亡率。结果表明,随牛初乳IgG饲喂剂量的增加,21日龄断奶平均个体重和0-21日龄平均日增重均逐渐降低,而腹泻发病率和死亡率则有所提高,但组间差异均不显著(p>0.05)。     

哺乳仔猪口服牛初乳IgG效果观察

从22窝初生仔猪中选取120头，按品种、体重、性别均匀地分成3个组，24h内分别按0mg、1000mg、2000mg剂量灌服牛初乳IgG，测定仔猪21日龄断奶个体重，计算0-21日龄平均日增重，统计仔猪0-21日龄腹泻发病率和死亡率。结果表明，随牛初乳loG饲喂剂量的增加，21日龄断奶平均个体重和0-21日龄平均日增重均逐渐降低，而腹泻发病率和死亡率则有所提高，但组间差异均不显著（p〉0．05）。     

莽草酸对PEDV感染仔猪生长性能、腹泻指数、血清免疫及抗氧化指标的影响

试验旨在研究莽草酸对感染猪流行性腹泻病毒(PEDV)仔猪的生长性能、腹泻指数、血清免疫及抗氧化指标的影响。将120头感染PEDV的7日龄“杜×长×大”仔猪随机分为6组,每组5个重复,每个重复4头猪。处理1组、2组、3组分别每日给感染PEDV仔猪灌服800、400、200 mg/kg莽草酸,处理4组每日给感染PEDV仔猪灌服400 mg/kg绿原酸,处理5组每日给感染PEDV仔猪灌服2万单位庆大霉素,处理6组为阳性对照组,另选选择20头健康仔猪作为空白对照组。试验期为5 d,之后观察3 d。结果显示,与阳性对照组相比,处理1组、2组、3组仔猪平均日增重(ADG)均显著升高(P<0.05)。处理1组和2组仔猪的PEDV感染治愈率均达到85%,处理5组仔猪的PEDV感染治愈率为65%;处理1组、2组、3组仔猪血清中的免疫球蛋白G (IgG)含量均显著升高(P<0.05);处理1组、2组、3组仔猪血清中的总超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、一氧化氮(NO)、髓过氧化物酶(MPO)、谷胱甘肽过氧化物酶(GSH-Px)活性及总抗氧化能力(T-AOC)显著升高(P<0...     

不同补铁方法对仔猪生长发育的影响试验

比较不同日龄 (3 ,6,9日龄 )补铁、不同补铁剂量和补铁次数对仔猪增重和白痢发病率的影响。结果表明 ,初生仔猪在 3日龄时 ,一次性补铁 1 50mg/头效果较佳 ,35日龄仔猪断奶时增重较 9日龄组和对照组有显著差异 ;一次性补铁 1 0 0mg/头 ,虽能显著提高仔猪增重和降低白痢发病率 ,但其效果不如 1 50mg/头组 (P <0 0 5)。 2次补铁更能充充分发挥仔猪的生长潜力     

益生菌对哺乳仔猪生产性能及胃肠道生理状态的影响

针对哺乳仔猪发病率和死亡率高的问题,本研究通过定期给乳仔猪口服益生菌,观察其对哺乳仔猪生长性能和健康的影响。选择品种相同、出生日期及体质量相近的仔猪15窝,每窝选择8头仔猪,共计120头哺乳仔猪,分为4个处理组,每组30头仔猪,每窝中每组2头仔猪(公母各半)。试验分组如下:对照组,灌服生理盐水;试验Ⅰ组,灌服干酪乳杆菌培养液(1×109 CFU/mL);试验Ⅱ组,灌服粪肠球菌培养液(1×109 CFU/mL);试验Ⅲ组,灌服干酪乳杆菌和粪肠球菌混合培养液(比例为3∶1)。仔猪出生时灌服1mL,在7,14,21日龄时分别灌服2,3,4mL。仔猪于21日龄断奶,并持续观察至28日龄。结果表明,灌服益生菌试验Ⅰ~Ⅲ组21,28日龄仔猪的平均日增重分别比对照组提高了16.57%,15.73%,17.55%及17.61%,19.49%,27.40%(P0.05);21日龄仔猪的死亡率和腹泻率分别比对照组下降了58.46%,43.13%,64.82%及53.59%,53.10%,55.30%(P0.05);断奶后7d仔猪的腹泻率分别比对照组下降了62.60%,51.93%,70.26%(P0.05)。3个益生菌组之间的生产指标均差异不显著(P0.05)。另外,复合益生菌组仔猪的胃肠道中蛋白酶和淀粉酶活性及乳酸菌数量显著高于对照组(P0.05),而pH值和大肠杆菌数量则显著低于对照组(P0.05)。血清学分析表明,3个益生菌组21日龄仔猪血清IgA和IgG的含量显著高于对照组(P0.05),复合益生菌组血清谷丙转氨酶(ALT)和谷草转氨酶(AST)的含量显著低于对照组(P0.05)。说明益生菌可提高哺乳仔猪生长性能和健康指数,对于哺乳仔猪的生产具有良好的促进作用。     

Effects of graded levels of xylo-oligosaccharides on growth performance,serum parameters,intestinal morphology,and intestinal barrier function in weaned piglets

The objective of this study was to investigate the effects of xylo-oligosaccharides (XOSs) supplementation on growth performance, serum parameters, small intestinal morphology, intestinal mucosal integrity, and immune function in weaned piglets. A total of 240 weaned piglets with an average body weight (BW) of 8.82 ± 0.05 kg (28 d of age) were assigned randomly to four dietary treatments in a 28-d trial, including a control (CON) diet and three diets with XOS supplementation at the concentration of 100 (XOS100), 500 (XOS500), and 1,000 (XOS1000) mg/kg. There were four replicates per treatment with 15 pigs per pen. From day 1 to 14, there were no differences (P > 0.05) in average daily gain (ADG), average daily feed intake, and gain to feed ratio (G:F) during the different treatments. The different doses of XOSs showed a quadratic effect on BW on day 28, ADG, and G:F on day 1 to 28 of piglets (P < 0.05). From day 15 to 28, ADG of pigs fed the XOS500 diet was higher (P < 0.05) than pigs fed the CON diet. During the overall period (day 1 to 28), pigs fed the XOS500 diet had a higher BW, ADG, and G:F than pigs fed the CON diet (P < 0.05). In addition, compared with the CON group, the XOS500 group had significantly higher serum total antioxidant capacity, total superoxide dismutase and catalase levels, and lower malondialdehyde levels on days 14 and 28 (P < 0.05). The serum immunoglobulin G (IgG) concentration in the XOS500 group was also significantly higher compared with the CON group on days 14 and 28 (P < 0.05). However, serum immunoglobulin A and immunoglobulin M were not affected by the dietary treatments. Supplementation of XOS500 to the feed significantly increased the villus height (VH) and VH to crypt depth ratio in the jejunum and ileum in comparison with the CON and XOS1000 groups. Moreover, the XOS500 group significantly elevated the expression levels of occludin and zonula occludens protein-1 in the ileum compared with the CON group. The ileal interleukin (IL)-1β, IL-8, and interferon (IFN)-γ mRNA expression levels in the XOS100 and XOS500 groups were markedly lower than in the CON group. In contrast, the ileal IL-10 mRNA expression levels were remarkably higher in the XOS500 than in the CON group. In conclusion, XOSs have a beneficial effect on growth performance by improving serum antioxidant defense system, serum IgG, small intestinal structure, and intestinal barrier function in weaned piglets.     

单宁和氧化锌组合对断奶仔猪粪便菌群、血清抗氧化及肝脏功能指标的影响

本试验旨在研究单宁和氧化锌不同水平组合对断奶仔猪粪便菌群及血清免疫、抗氧化和肝脏功能相关血液生化指标的影响。选用体重相近,25日龄杜×长×大断奶仔猪270头,随机分成9组,每组3个重复,每个重复10头猪。对照组饲喂基础日粮加高锌（3 000 mg/kg氧化锌）的日粮,试验1~8组（T1~T8）分别饲喂基础日粮添加以下氧化锌与单宁组合的日粮：（2 000+0）、（2 000+1 000）、（1 000+0）、（1 000+1 000）、（1 000+1 500）、（1 000+2 000）、（0+1 500）、（0+2 000） mg/kg。试验期30 d。分别于试验的第14与28天采集仔猪新鲜粪样,测定粪便中各细菌的数量。试验结束采集血样,测定血清免疫、抗氧化及肝脏功能相关指标。结果显示,试验第14天,各组断奶仔猪粪便大肠杆菌、乳酸菌和双歧杆菌数量均无显著差异（P>0.05）。试验第28天,T1、T6组断奶仔猪粪便乳酸菌数量极显著高于对照组（P<0.01）,而双歧杆菌数量则显著高于对照组（P<0.05）,但各组大肠杆菌数量均无显著差异（P>0.05）。各组断奶仔猪血清中IgG和IgA含量、MDA含量及GSH-Px活力均无显著差异（P>0.05）。但T5、T6、T7、T8组断奶仔猪血清GSH含量极显著高于对照组（P<0.01）。除了T2和T5组,其余各组猪血清谷草转氨酶活性均显著或极显著低于高锌对照组（P<0.05;P<0.01）。本试验结果表明,与单一使用高剂量氧化锌相比,单宁与氧化锌适量水平组合有利于乳酸菌及双歧杆菌的增殖、提高断奶仔猪抗氧化能力并对肝脏产生保护作用。     

Absorption of bovine colostral immunoglobulins G and M in newborn foals

The uptake of colostral IgG and IgM, their serum half-lives, and the rates of endogenous synthesis of IgG and IgM were evaluated in 6 newborn foals fed bovine colostrum (principals) and 6 foals allowed to suckle their dams (controls). The principal foals were fed 400 ml of bovine colostrum (IgG, 10,000 mg/dl and IgM, 200 mg/dl) at 2-hour intervals, from 2 to 20 hours after foaling (total dose, 4 L). Serum IgG and IgM concentrations were determined by single radial immunodiffusion from birth to 98 days of age. At foaling, principal foals had no detectable serum equine IgG, but 1 control foal had serum equine IgG of 185 mg/dl. After ingestion of colostrum, there was no significant difference in the maximal serum bovine IgG concentration (range, 1,350 to 3,300 mg/dl) in the principal foals, and maximal serum equine IgG concentration in the control foals (range, 500 to 6,000 mg/dl). The calculated biological bovine and equine IgG half-life in the principal and control groups was 9.4 and 26 days, respectively. Endogenous IgG synthesis was first detected in 1 principal foal at 3 days of age, but was detected first between 28 and 42 days in the other principal foals. Starting on day 56 there was no significant difference in serum equine IgG concentration between groups. At foaling, foals in both groups had low equine IgM concentrations. In the control foals, there was marked individual variation in the increases in equine IgM concentration (range, 5 to 73 mg/dl) after ingestion of colostrum.(ABSTRACT TRUNCATED AT 250 WORDS)     

饲粮维生素A添加水平对7～12月龄梅花鹿生长性能、血清生化指标及初角茸生长的影响

本试验旨在研究饲粮维生素A添加水平对7~12月龄梅花鹿生长性能、血清生化指标及初角茸生长的影响。选取40只7月龄平均体重为(39.64±4.10)kg的健康雄性梅花鹿,随机分成4组,每组10个重复,每个重复1只,分别饲喂在基础饲粮(含5 mg/kgβ-胡萝卜素)中添加0(对照组)、2 500、5 000和10 000IU/kg维生素A的试验饲粮。试验期从7月龄开始至12月龄结束。结果表明:1)饲粮维生素A添加水平对梅花鹿生长性能无显著性影响(P0.05)。2)与对照组相比,饲粮添加2 500、5 000IU/kg维生素A显著提高梅花鹿血清免疫球蛋白A(IgA)含量、总超氧化物歧化酶(T-SOD)活性(P0.05),饲粮添加2 500、5 000、10 000IU/kg维生素A显著提高谷胱甘肽过氧化物酶(GSH-Px)活性(P0.05),饲粮维生素A添加水平对血清免疫球蛋白G(IgG)、免疫球蛋白M(IgM)、丙二醛(MDA)、睾酮(T)及雌二醇(E2)含量无显著性影响(P0.05)。3)5 000IU/kg维生素A添加组初角茸干茸重显著高于对照组(P0.05),但与其他2组差异不显著(P0.05)。由此得出,在本试验条件下,适量添加维生素A能够增强7~12月龄梅花鹿免疫和抗氧化功能,提高初角茸干茸重。7~12月龄梅花鹿饲喂以玉米和苜蓿草粉为主的饲粮时,饲粮维生素A适宜添加水平为2 500~5 000IU/kg。     

酿酒酵母培养物对817肉仔鸡生长性能、养分表观利用率及肠道菌群的影响

本试验旨在探讨酿酒酵母培养物(SC)对817肉仔鸡生长性能、养分表观利用率及肠道菌群的影响。试验选取1日龄体重相近的817肉仔鸡600只,随机分为5组,每组6个重复,每个重复20只。对照组饲喂基础饲粮,抗生素组在基础饲粮中添加20 mg/kg硫酸黏杆菌素+2.6 mg/kg黄霉素,试验Ⅰ、Ⅱ、Ⅲ组分别在基础饲粮中添加2 500、5 000、7 500 mg/kg SC,试验期为60 d。结果显示:1)1~21日龄,试验Ⅱ、Ⅲ组的平均日增重(ADG)、平均日采食量(ADFI)均显著高于对照组(P0.05),与抗生素组无显著差异(P0.05);在22~60日龄和1~60日龄2个阶段,试验Ⅱ组的ADG显著高于对照组(P0.05),ADFI显著高于抗生素组(P0.05);22~60日龄,3个试验组的料重比和死亡率较对照组差异均不显著(P0.05),但在1~60日龄有下降趋势(0.05≤P0.10)。2)试验Ⅱ、Ⅲ组较对照组显著提高了总磷的表观利用率(P0.05);各组粗蛋白质、钙的表观利用率无显著差异(P0.05)。3)与对照组相比,试验Ⅰ组盲肠中大肠杆菌的数量显著降低(P0.05),与抗生素组无显著差异(P0.05);试验Ⅱ组盲肠中乳酸菌数量和试验Ⅲ组空肠中双歧杆菌数量均显著高于对照组和抗生素组(P0.05)。由此可见,饲粮中添加适宜水平的SC能增加817肉仔鸡ADFI和ADG,降低料重比,增强对饲粮中总磷的利用率,促进乳酸菌、双歧杆菌的增殖,抑制大肠杆菌的增殖;当SC添加水平为5 000 mg/kg时,对动物的促生长效果最佳,优于抗生素。     

Effect of Dietary Grape Pomace on Growth Performance,Organ Index and Blood Biochemical Indexes in Sheep

This experiment was aimed to investigate the effect of grape pomace on growth performance,organ index and blood biochemical indexes in sheep.A total of 24 hybrid 5-month-old Dorper (♂)×Small Tail Han sheep (♀) F1 male lambs weighted at 25 kg were randomly divided into 4 groups with 6 lambs per group.All these sheep were fed diets with the addition of grape pomace at 0,5%,10%,20% on a dry weight basis, respectively.The results showed that the ADG in group 10% was extremely significantly higher than that in group 0 and 5% (P<0.01),and the weights of liver and kidney in group 10% were notably higher than that in group 0 and 5% (P<0.05).The weights of large intestinein in group 10% and 20% were obviously higher than that in the other two groups (P<0.05).The weights of abomasum were extremely significantly increased in grape pomace supplemental groups (P<0.01).Grape pomace could significantly improve serum HDL-C,and it was the highest in group 10% (P<0.05).ALT and AST had the same variation trend,they were the lowest in group 5%,and the values in group 5% were significantly lower than that in group 0 and 20% (P<0.05).Compared with group 0,the serum CRE in group 5% was significantly decreased (P<0.05),while the serum T-AOC significantly improved (P<0.05).The CAT enzyme activity was highest in group 20%,it was higher than the other groups (P<0.05).In conclusion,adding grape pomace properly could improve ADG,promote development of liver,kidney and digestive organs,increas serum HDL-C level,and improv the level of serum antioxidant.Taking all factors into account,dietary supplementation with 10% of grape pomace was advisable.     

日粮中添加葡萄皮渣对绵羊生长性能、器官指数及血液生化指标的影响

本研究在绵羊日粮中添加一定量的葡萄皮渣,旨在研究其对绵羊生长性能、器官指数及血液生化指标的影响。试验选取24只5月龄、体重25 kg左右的杜泊羊×小尾寒羊杂交公羊,采用完全随机设计分为4组,每组6只,分别饲喂不同葡萄皮渣添加水平（0、5%、10%、20%）日粮。结果表明,10%添加组日增重（ADG）显著高于0、5%添加组（P<0.05）;10%添加组肝脏及肾脏重量显著高于0、5%添加组（P<0.05）;10%和20%添加组的大肠重量显著高于其他两组（P<0.05）;添加葡萄皮渣能极显著增加皱胃重量（P<0.01）。适量添加葡萄皮渣能显著提高绵羊血清高密度脂蛋白胆固醇（HDL-C）含量,其中以10%添加水平最高（P<0.05）;谷丙转氨酶（ALT）与谷草转氨酶（AST）变化趋势相同,均以5%添加组最低,显著低于0、20%添加组（P<0.05）;与未添加组相比,5%添加组绵羊血清肌酐（CRE）含量显著降低（P<0.05）,而总抗氧化能力（T-AOC）明显提高（P<0.05）;过氧化氢酶（CAT）活性以20%添加组最高,显著高于其他3组（P<0.05）。由以上结果可知,日粮中添加一定量的葡萄皮渣可提高绵羊日增重,促进肝脏、肾脏及消化器官的发育,增加血清高密度脂蛋白胆固醇含量,提高血清抗氧化水平。综合各个指标,葡萄皮渣添加量以10%为宜。     

初乳饲喂次数对娟姗犊牛生产性能的影响

为研究探讨初乳饲喂次数对娟姗犊牛生产性能的影响,试验选取初生重接近的健康娟姗犊牛20 头,随机分为4 组,分别为对照组、试验I组、II组和III组,每组5 头犊牛,试验期为60 天。4 组犊牛出生当日饲喂两次初乳,首次初乳量按照体重的10.0%进行灌服,第2次初乳于出生后6~8 h按照体重的5.0%进行饲喂。4 组犊牛出生当日在产房饲养,2日龄时均转为室外犊牛岛单栏饲养。2日龄后,对照组每天上午06:00和下午16:00时各饲喂常乳1次,2~6日龄每次饲喂1.50 L,7~20日龄每次饲喂1.80 L,21~35日龄每次饲喂2.50 L,36~60日龄每次饲喂3.00 L,自7日龄开始犊牛自由采食颗粒料。试验Ⅰ组、Ⅱ组、Ⅲ组分别继续饲喂初乳至犊牛2日龄、4日龄、6日龄后再饲喂常乳,饲喂时间和饲喂量与对照组一致。结果表明:(1)在饲喂初乳后48 h、72 h、96 h,试验组与对照组犊牛血清免疫球蛋白g(IgG)均差异显著(p<0.05),120 h、144 h、168 h,试验Ⅰ组与对照组比较,犊牛血清IgG含量差异不显著(p>0.05),试验Ⅱ组、Ⅲ组血清IgG含量与对照组相比,差异极显著(p<0.01)。(2)随着初乳饲喂次数的增加,可有效降低犊牛20日龄内腹泻发生率,试验Ⅰ组、Ⅱ组、Ⅲ组较对照组比较犊牛腹泻发生率分别降低9.5%、22.5%、36.5%,治疗犊牛腹泻总成本较对照组分别下降12.0 元、43.2 元、76.8 元,3 组试验组犊牛成活率为100.0%。(3)初乳饲喂次数的增加,使0~60日龄娟姗犊牛平均日增重(ADG)升高,试验组与对照组相比较,日增重均差异极显著(p<0.01),分别增加16.7 g、33.3 g、80.0 g。试验Ⅱ组、Ⅲ组较试验Ⅰ组ADG差异也极显著(p<0.01)。综合考虑,建议娟姗犊牛饲喂初乳至6日龄,可降低犊牛腹泻发生率、减少治疗费用,提高犊牛成活率及ADG。     

Serum IgG and total protein concentrations in dairy calves fed two colostrum replacement products

OBJECTIVE: To evaluate effects of 2 commercially available colostrum replacement products on serum IgG and total protein concentrations in dairy calves. DESIGN: Prospective clinical trial. ANIMALS: 84 Holstein bull calves from a single dairy. PROCEDURES: Calves were randomly assigned to be given 4 quarts of colostrum (group 1; n = 21), 2 packages of a colostrum replacement product (product A; group 2; 21), 1 package of a different colostrum replacement product (product B; group 3; 21), or 2 packages of product B (group 4; 21). Treatments were given within 3 hours after birth, and blood samples were collected 24 hours later and submitted for determination of serum total protein and IgG concentrations. RESULTS: Group 1 calves had significantly higher serum total protein and IgG concentrations than did calves in the other 3 groups. However, the percentage of calves with adequate passive transfer (ie, serum IgG concentration > 1,000 mg/dL) was not significantly different among groups 1 (90%), 3 (81%), and 4 (95%). In contrast, only 10% of calves in group 2 had adequate passive transfer. It was predicted that calves fed product B that had serum total protein concentrations > 5.2 g/dL would have serum IgG concentrations > 1,000 mg/dL at least 90% of the time. CONCLUSIONS AND CLINICAL RELEVANCE: Results indicated that product B could be considered as an alternative to colostrum in dairy calves, but product A failed to routinely provide adequate serum IgG concentrations when fed according to label directions.