Analysis of weaning-induced stress in Saanen goat kids.

摘要: In young ruminants' life, weaning often coincides with a period of growth stasis and poor welfare. The present study aimed at evaluating the effect coping new diet on behavioural haematological stress indicators in goat kids subjected to commonly adopted practice. Immediately after birth, male Saanen were divided into two groups: MILK WMIX. All fed colostrum for first 3 days then milk age 29 days. After that, continued receive milk, while WMIX underwent completely weaned by day 48. Animal behaviour was recorded daily. From 23-50, blood samples taken weekly analysed immune function. No abnormal behaviour, such as injurious behaviours or stereotypies, observed either experimental groups throughout period. During last week, fasting plasma cortisol level significantly lower, whereas activity both alanine aminotransferase (ALT) aspartate (AST) higher kids, relation ones. Anyway, data within normal physiological range no difference neither haptoglobin, ceruloplasmin, albumin antithrombin III, nor immunoglobulin A G, any time, signalling stressful condition. Therefore, differences cortisol, ALT AST could be consequence metabolic changes that occur during transition from pre-ruminant ruminant state. gradual 48 did not result condition had negative weight gain. Results suggest parameters provide information animal stress, activity, can vary status animals may bias assessment.