Authors : Ibrahim Tapki
Abstract: This study was carried out to investigate the differences between two milk allowance methods based on 10% of birth weight or 10% of weekly adjusted live weight of dairy calves in respect to growth performance. Twenty Holstein Friesian calves (14 males, 6 females) were allocated into two different milk feeding schedules, one was based on 10% of birth weight (IBW, n = 10) and another was 10% of live weight which was determined on weekly basis (ABW, n = 10), for feeding whole milk during the rearing period. Each calf was monitored seven times in a day and these observations were made twice a week for a period of 1 h starting at 06.00, 08.00, 12.00, 14.00, 18.00, 20.00 and 22.00 h in 10 min intervals for determining behavioural responses. ABW showed less eating calf starter behaviour (9.66% vs 14.17%), eating hay behaviour (8.04% vs 11.62%), drinking water (2.07% vs 3.92%) and ruminating behaviour (15.55% vs 20.08%) than IBW calves (p< 0.01). ABW calves showed the higher rate of lying (17.39% vs 13.20%), standing (15.31% vs 13.22%), restlessness (13.71% vs 6.18%) and licking contact (5.81% vs 2.09%) than IBW calves, except playing (12.46% vs 15.52%) (p< 0.01). To conclude, weekly increased milk allowance decreased nutritional behaviours which may lead to delay in ruminal development, increased restlessness behaviour which susceptible to poorer welfare in dairy calves.
Ibrahim Tapki , 2007. Comparison of two conventional restricted daily milk allowance methods in dairy calf rearing with respect to growth and behavioural responses II. Behavioural responses . Journal of Animal and Veterinary Advances, 6: 421-426.