Abstract #M308

# M308
Feeding frequency of the high cow ration recipe on California dairies.
Yolanda Trillo*1, Alfonso Lago2, Noelia Silva-del-Rio1, 1UC Davis School of Veterinary Medicine, VMTRC, Tulare, CA, 2DairyExperts, Tulare, CA.

The objective of this study was to describe the feeding frequency of high cow ration (HCR) recipe on 26 California dairies ranging in size from 1,100 to 6,900 cows. Records from a consecutive 12-mo period were extracted from the feeding management software FeedWatch 7.0. The variables included were date, recipe, recipe number, feeding sequence, start time, end time and pen number. Descriptive statistics were conducted with SAS 9.3. The median frequency of feedings per pen within a dairy varied from 1 (n = 2), 2 (n = 10), 1 to 2 (n = 6), 1 to 3 (n = 4) and 2 to 4 (n = 1) times per day. Sixteen dairies had at least 90% of the pens fed the same number of times consistently (80% of the times or more) and 10 dairies had at least 30% of the pens fed the same number of times inconsistently (60% of the times or less). For dairies with a median of 2 feedings per day (n = 18), the time elapsed between the first and second feedings was <3 h (n = 8), from 3 to 6 h (n = 8), and from 6 to 9 h (n = 8). For dairies with 3 feedings per day (n = 6), the time elapsed between the first and the second feeding ranged from 2 to 4 h, and between the second and the third feeding was between 2 to 5 h. Dairies with 1, 2, or 3 feedings per day started feeding at 0300 or 0530 a.m. (n = 2), 0215 to 1030 a.m. (n = 18), and 0200 to 0815 a.m. (n = 6) respectively. The last feeding was done from 0530 a.m. to 1530 p.m. for dairies feeding 2 times (n = 18) and from 0800 a.m. to 1330 p.m. (n = 6) for dairies feeding 3 times. Some dairies were consistent (at least 85% of the time), feeding each recipe load to a single pen (n = 4), 2 pens (n = 2) or 3 pens (n = 2). However, most dairies (n = 18) split a recipe load among a combination of 1, 2, 3, 4, or more than 4 pens. At least 50% of the times, a recipe load was split among 4 or more pens in 3 dairies. One dairy split 37% of the times a recipe load among 8 pens. There was an important variation on the number of feedings per pen within and across dairies. Many dairies were inconsistent on how they split a recipe load among pens.

Key Words: dairy cattle, high cow ration, feeding management software