Abstract
Sub-optimal heifer growth is associated with higher disease rates and reduced future performance and longevity in the dairy herd. This report describes a system for measuring heifer growth from birth to first calving that was used on commercial dairy farms in South West England, in order to gather benchmarking data to feed back to farmers. Weights (n = 8443) were collected from 20 farms.
There was marked variation in individual and herd mean growth rates. Overall, calves gained no weight in the first 8 days after birth and had a very low growth rate (median 0.12 kg/day) up to 30 days, a period when feed conversion efficiency is high and calves are vulnerable to disease. Heifers whose growth rate up to 180 days was low were significantly less likely to achieve target service weight (374 kg) by 420 days. Monitoring heifer growth during the rearing period enables farmers to improve heifer growth rates and so impact both the efficiency of heifer rearing and, potentially, the productivity and performance of the adult herd.
There was marked variation in individual and herd mean growth rates. Overall, calves gained no weight in the first 8 days after birth and had a very low growth rate (median 0.12 kg/day) up to 30 days, a period when feed conversion efficiency is high and calves are vulnerable to disease. Heifers whose growth rate up to 180 days was low were significantly less likely to achieve target service weight (374 kg) by 420 days. Monitoring heifer growth during the rearing period enables farmers to improve heifer growth rates and so impact both the efficiency of heifer rearing and, potentially, the productivity and performance of the adult herd.
Original language | English |
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Pages (from-to) | 9-14 |
Number of pages | 21 |
Journal | Veterinary Journal |
Volume | 212 |
Early online date | 27 Oct 2015 |
DOIs | |
Publication status | Published - Jun 2016 |
Keywords
- Dairy cattle
- Calves
- Growth rates
- Heifers
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Professor Kristen K Reyher
- Bristol Veterinary School - Professor of Veterinary Epidemiology and Population Health, Senior Lecturer in Farm Animal Science
- Bristol Population Health Science Institute
- Biostatistics, Epidemiology, Mathematics and Ecology
- Infection and Immunity
- Cabot Institute for the Environment
Person: Academic , Member