Effects of intensified or conventional milk feeding on pre-weaning health ‎and feeding behavior of Holstein female calves around weaning

Document Type: Original Article

Authors

1 Department of Animal Sciences, Faculty of Agriculture, Urmia University, Urmia, Iran

2 Department of Animal Sciences, Campus of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

10.30466/vrf.2018.88679.2149

Abstract

Health, inflammatory, and stress indices as well as feeding behavior around weaning were measured for Holstein female calves fed intensified milk or conventionally during the pre-weaning period. Calves (n ꞊ 48) were randomly assigned to one of two experimental treatments including a conventional (CF) or an intensified feeding (IF) groups. In CF group, calves (n ꞊ 24) received 0.52 kg of dry matter (DM) per day from pasteurized whole milk (23.00% crude protein (CP) and 27.00% fat) until day 50 of age. In IF group, calves (n= 24) fed 0.97 kg of DM per day on average for the first three weeks, and then, milk allowance decreased gradually to reach 0.52 kg DM per day and continued until day 50. All calves were gradually weaned from day 51 to 56. Blood samples were taken on days 14, 28, and 57 at 06:30 AM for serum amyloid A (SAA), cortisol, alanine aminotransferase (ALT), and iron analyses. Conventionally fed calves had more days with fever during the pre-weaning period. Blood SAA and cortisol levels were higher in CF calves on day 14. However, SAA levels were higher for IF calves on day 57. Intensified milk-fed calves spent more time for standing than CF calves. A trend to be significant was observed for non-nutritive oral behavior in IF calves. In summary, dairy calf health can be improved by intensified milk feeding during the pre-weaning period; however, this method has the potential to reduce calves welfare around weaning transition.

Keywords



Articles in Press, Corrected Proof
Available Online from 29 September 2020
  • Receive Date: 27 June 2018
  • Revise Date: 27 August 2018
  • Accept Date: 25 September 2018