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Dairy heifers are increasingly reared in commercial heifer-raising facilities that do not include milking cows. In the United States, the proportion of dairy operations that sent calves to commercial heifer-raising facilities increased from 3
were reviewed and approved by the Rural Technologies Incorporated Institutional Animal Care and Use Committee. Thirty-five 6to 9month-old beef (Angus cross) heifers were acquired for the study and randomly assigned to 1 of 3 treatment groups. Heifers in
transportation during periods of high ambient temperature (≥ 32.2°C) on physiologic and behavioral indices of beef heifers. Our hypotheses were that transported heifers would have increased body temperatures, increased concentrations of stress biomarkers in blood
History A 2-year-old pregnant heifer aborted her first calf in the third trimester. She was housed on an outdoor pasture with other bred heifers. Third-trimester abortions had been a chronic problem in this herd for the past 7 years. The farm
reasons for culling mature beef cattle is pregnancy status. 2 To maintain or expand herd size, culled cows must be replaced, and they are usually replaced with heifers. The selection of replacement heifers represents a substantial investment that has the
in horses 6–9 and cattle. 10 The purpose of the study reported here was to determine the effect of A 2 -adrenoceptor agonists, detomidine and xylazine, in pony mares and heifers, respectively, as determined in a major artery and by the extent of
Committees at Novartis Animal Health and Rural Technologies. Thirty-six 4-week-old Holstein heifers with no history of vaccination or exposure to LHB from a single source dairy were selected for use in this study. The calves had been fed colostrum from cows
—The 12-week study was conducted over 2 years (1999 and 2001). In each year, 48 weanling crossbred beef heifers were purchased in late summer from 4 to 5 stocker feedyards within Eastern Ontario, for a total of 96 heifers entered into the study over the
objective of the study reported here was to determine whether the vaccination of heifers with 2 doses of a multivalent MLV vaccine prior to breeding would provide protection of fetuses against BVDV infection and prevent abortion caused by BHV1 infection when
A 19-month-old 536.4-kg (1,180-lb) Brown Swiss heifer was referred to our veterinary medical teaching hospital for evaluation of a firm swelling lateral and immediately proximal to the right metatarsophalangeal joint. The heifer was pregnant (5
