Feeding Behavior of Steers Fed a Complete Mixed Ration

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Abstract
Feeding behavior of 5 Holstein steers fed a complete mixed ration was studied by use of individual, electronically controlled feeding behavior units. Both individual meal and daily behavioral parameters were measured. Number of meals, size of each individual meal, time spent eating, and intervals between meals were measured. Eating rates were then calculated. Diurnal feeding patterns were observed with 60.9% of the meals occurring between 6 a.m.-4 p.m. For individual meals, body weight accounted for less than 30% of the variation in meal size. Average meal size was 414.5 g. Means for overall meal duration, actual meal duration, overall eating rate, and actual eating rate were 20.3 min, 13.7 min, 23.1 g/min, and 30.0 g/min, respectively. Meal size per body weight (g/kg or g/kg.75) was relatively constant during observation. Both increased eating rate and increased meal length were associated with larger meals. Eating rate tended to plateau while meal length continued to increase with larger meals. Steers consumed 10.01 meals/day while total daily overall meal duration and actual meal duration were 220.9 and 156.4 min.