Association Between Individual Animal Traits, Competitive Success and Drinking Behavior in Dairy Cows After Milking

After milking, dairy cows seek the nearest water trough, but access depends on competitive success. This study descriptively characterized individual drinking behavior after milking in association with physiological traits and competitive success in a herd of 42 lactating Brown Swiss cows held in a free-range barn. Cows were milked and fed twice a day, and the drinking behavior was video recorded after leaving the milking parlor during 22 milkings in July 2022. Water consumption and 33 behavioral parameters were recorded. Competitive success was defined by an index calculation. Milk production traits correlated positively with the number of trough visits, the total duration of drinking, the duration of water intake and drinking breaks, and the water volume consumed. High-yielding dairy cows exhibited twice as many agonistic interactions as low-yielding ones, suggesting that performance-based grouping increases aggressive interactions. Further, subtle dominance interactions, such as "staring", comprise a major part of confrontations at the trough. Cows with low competitive success more frequently pursued other activities before they drank and were more frequently interrupted by agonistic interactions. Considering body and performance traits in association with individual drinking patterns in evaluating on-farm water management seemed valuable, therefore, a review of current recommendations for water supply is suggested.