Lack of growth response in selenium deficient veal calves injecte with selenium midway through fattening
DOI:
https://doi.org/10.21423/bovine-vol0no21p91-94Keywords:
Selenium, veal calves, growth, infectious disease, antibioticsAbstract
The study was conducted in an Eastern Washington veal operation. Newborn Holstein bull calves originating from Western Washington farms were transported several hundred miles to the veal unit. Batches of approximately 60 calves were raised on slatted wooden stalls overlying a manure pit in heated and mechanically ventilated rooms. On arrival, processing included injections of iron and Se / vitamin E, and vaccinations with intranasal modified live virus IBR/PI3 and Clostridium perfringens type C and D toxoid. Followup disease prophylaxis consisted of boosters of the 2 vaccines in 3 weeks and administration of iron by injection or orally as needed based on periodic hemoglobin determinations. Calves were fattened for 4 months on an all-milk diet containing 0.10 mg Se (sodium selenite) and 136.0 mg vitamin E (DL - a tocopheral acetate) per kilogram dry matter.