Abstract #M275

# M275
Evaluation of colostrum management, feeding management, and weaning practices on US dairy operations.
Chelsey B. Shivley*1,2, Jason E. Lombard2, Ashley E. Adams1,2, Natalie J. Urie1,2, Charles P. Fossler2, Christine A. Kopral2, 1Colorado State University, Fort Collins, CO, 2USDA:APHIS:VS:Center for Epidemiology and Animal Health, Fort Collins, CO.

The National Animal Health Monitoring System’s Dairy 2014 study evaluated colostrum management, feeding management, and weaning practices on 1,261 operations from 17 of the nation’s top dairy states. Results from the study indicate that on average heifer calves were given their first feeding of colostrum 3.6 h following birth. The highest percentage of operations (53.2%) administered colostrum by hand, followed by both hand-feeding and suckling the cow (40.5%), and only suckling the cow (6.3%). For the 93.7% of operations that hand-fed colostrum, 87.4% fed colostrum with a bottle, 8.1% with an esophageal feeder, and 4.5% with a bucket. Most dairies (53.0%) fed 2 L of colostrum at the first feeding, and 62.1% of operations fed another 2 L within the first 24 h following birth. About half of all operations (49.3%) stored colostrum, with freezing being the most common method of storage (73.0% of operations). About half of dairies that hand-fed colostrum (53.3%) estimated colostrum quality, with visual appearance being the most common method used (45.1% of operations). Only 6.2% of operations monitored serum proteins to test passive-transfer status. Almost half of dairies (49.9%) fed milk replacer (MR), and 63.2% fed waste milk. Of operations that fed MR, percent protein was 20–24% on 89.2% of operations. About half of operations (56.4%) fed less than 4.7 L of waste milk or MR per day, with most operations (94.6%) feeding twice per day. The highest percentage of operations used bottles and buckets to feed waste milk or MR (77.2% and 72.3%, respectively). On average, heifer calves were first offered water at 17.3 d of age, starter grain at 10.8 d of age, and hay at 36.0 d of age. The average age at weaning was 8.8 weeks, and age was the most commonly used determinant for weaning on 50.2% of operations. These results show that less than 2 thirds of producers are feeding the recommended 3–4 L of colostrum at the first feeding on US dairies, indicating that producer education on colostrum management is warranted.

Key Words: dairy heifer calves, colostrum management, feeding management