To insure a high consistent reproductive program in a cow herd, 90 to 95 per cent of the cows must calve early each year and wean a heavy calf. To accomplish this, the producer should follow these steps: 1. Feed heifers to reach a target weight consistent with their breed. 2. Breed heifers 45 days to a bull known to sire small calves (Longhorn or Jersey or a proven bull within a breed). Also consider cows with Brahman blood to decrease birth weight. 3. Use a 60-day breeding season in the cow herd. 4. Have cows in good to moderate body condition at calving time. 5. Have cows gaining weight three weeks before breeding and during the breeding season. 6. Remove calves for 48 hours at the start of the breeding season. 7. Breed to fertile bulls.
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http://dx.doi.org/10.1016/s0196-9846(17)30091-5 | DOI Listing |
BMC Vet Res
January 2025
Department of Large Animal Diseases and Clinic, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Warsaw, 02-787, Poland.
Background: Elevated BHB levels are hypothesized to influence hepatic antioxidant enzyme expression and activity, contributing to oxidative response. However, the impact of BHB between 0.8 and 1.
View Article and Find Full Text PDFJ Dairy Sci
January 2025
Boehringer-Ingelheim Animal Health, Level 2, 3 Te Kehu Way, Mount Wellington, Auckland, New Zealand.
The aims of this study were to assess the effect of meloxicam at the time of lameness treatment for hoof-horn (HH) lesions in dairy cattle on 1) time to lameness soundness post trimming and block application and 2) reproductive success Five seasonal-calving pasture-based dairy farms located in the Waikato region of New Zealand were enrolled into a randomized clinical interventional trial. Farmers were tasked with identifying lame animals over a period of approximately -4 to 6 weeks relative to the herd start of mating (HSM), with lameness subsequently confirmed with lameness score (LS) by trained technicians (0-3 scale, where ≥2 are considered lame). Animals with a LS ≥2 were examined by a veterinarian who then enrolled animals if they presented lame with HH (white-line or sole) lesions.
View Article and Find Full Text PDFJ Dairy Sci
January 2025
The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian EH25 9RG, United Kingdom. Electronic address:
This study investigated the genetics of bovine tuberculosis (bTB) infectivity in Holstein-Friesian dairy cows using British national data. The analyses included cows with recorded sires from herds affected by bTB outbreaks between 2000 and 2022. Animals were considered bTB-positive if they reacted positively to the skin test and/or had positive post-mortem findings.
View Article and Find Full Text PDFJ Vet Diagn Invest
January 2025
Large Animal Clinical Sciences, Western College of Veterinary Medicine, Saskatoon, Saskatchewan, Canada.
An apparent outbreak of fenugreek forage toxicosis occurred in a beef cattle herd near Moose Jaw, Saskatchewan in February-May 2022. The herd had consumed fenugreek hay from late fall to early winter. Clinical signs included various degrees of weakness, ataxia, knuckling, walking on hocks, and recumbency.
View Article and Find Full Text PDFVet Clin North Am Food Anim Pract
January 2025
Department of Veterinary and Biomedical Sciences, Animal Disease Research and Diagnostic Laboratory, South Dakota State University, Brookings, SD 57007, USA.
Respiratory disease in cattle and small ruminants is caused by various factors, including inadequate biosecurity and biocontainment. Biosecurity and biocontainment depend on good husbandry. Testing on arrival and quarantining for 42 to 56 days could improve biosecurity.
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