Abstract #151

# 151
Performance of calf reared on waste milk or nonmedicated milk replacer contained sodium butyrate and Bacillus amyloliquefaciens.
O. V. Vazquez-Mendoza1, A. E. Kholif2, M. M. Y. Elghandour3, A. Z. M. Salem*3, V. L. Garcia-Flor4, T. A. Morsy2, 1Norel México S.A. de C.V, Parque Industrial El Marqués, Querétaro, México, 2Dairy Science Department, National Research Centre, Giza, Egypt, 3Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma del Estado de México, Toluca, Estado de México, Mexico, 4Centro de Ciencias Agropecuarias, Universidad Autónoma de Aguascalientes, Aguascalientes, México.

More interest is paid for the accelerated growth programs for dairy calves through enhancing early nutrition programs based on greater rates of liquid feeding for better mammary gland development and milk production. Appropriate supply of nutrients for calves through liquid feed including milk or milk replacer is essential for better performance and welfare. In a completely randomized design, the nutritional and economic efficiencies, and growth performance of 18 Holstein female dairy calves (41 ± 3.7 kg BW, 1 d old) fed either pasteurized waste milk (PWM) or calf milk replacer (CMR) were tested. Calves were fed colostrum (IgG; 70–100 mg/mL) within the first 2 h of life at the rate of 10% of their BW, and then offered 2 L every 12 h for 3 d, without access to solid feed. Calves were fed individually on PWM (n = 9) or CMR containing Bacillus amyloliquefaciens and sodium butyrate (n = 9) twice daily at 0900 and 1600 h for 60 d. From the fourth day, calves were offered pelleted starter feed (180 g CP and 338.2 g of NDF/kg DM) in the morning at 0900 h. Water was provided ad libitum. Health condition, body measurements, fecal bacteriological analysis and economic analysis were measured. No differences were observed for liquids and total starter intakes; however, calves fed on PWM consumed more (P < 0.05) starter DM during the period from d-16 to d-45 with greater metabolizable energy intake. Greater (P < 0.05) BW changes for PWM-calves than CMR-calves during the period from d-30 to d-60; with higher (P < 0.05) average daily gains during the period from d-16 to d-60. Health conditions did not differ between calves with greater faces score and lower cough score for CMR-calves. Calves fed CMR had greater fecal number from Klebsiella oxytoca and Proteus vulgaris with the same count of E. coli. Greater economic evaluation (P < 0.0001) for CMR-calves than PWM-calves were obtained. It could be concluded that the CMR can be used efficiently rather than PWM without reducing feed efficiency and with more profits in feeding dairy calves during the pre-weaning period.

Key Words: calf, health condition, milk replacer