Study links higher milk allowance to more play in dairy calves

University of Bristol researchers report that dairy calves given a higher milk allowance were more likely to prioritize play, while calves on a lower allowance focused on finding milk and completed food-reward tasks faster. In the study, published April 13 in Scientific Reports, calves fed up to 12 liters of milk per day played more in a hole-board test arena, while calves fed 6 liters per day, described by the researchers as a standard farm allowance, showed stronger food motivation and better recall for milk rewards. The team says the findings add to evidence that hunger can suppress other behaviors, including play, in preweaned calves. (nature.com)

Why it matters: For veterinary professionals advising dairy clients, the study adds another welfare-focused argument for revisiting calf milk-feeding protocols. The authors link lower milk allowances with behavioral trade-offs that may reflect hunger, and they frame play as an indicator that calves’ basic needs are being met. That won’t settle feeding decisions on its own, especially given the practical balance among growth, health, labor, and weaning management, but it does strengthen the case that “standard” milk volumes may undershoot what some calves need. Earlier calf-welfare research has also tied higher milk allowances to more play and linked restricted feeding with signs of hunger. (bristol.ac.uk)

What to watch: Expect follow-up work on how milk allowance, housing, enrichment, and weaning strategies interact, and whether play can be used more consistently as an on-farm welfare indicator. (nature.com)