The researchers studied how calves behave when grazing on two types of grass, Brachiaria brizantha and Brachiaria decumbens. They found that calves spent less time grazing on Brachiaria brizantha compared to Brachiaria decumbens. However, they ruminated for longer on Brachiaria brizantha. Calves also took fewer bites per minute on Brachiaria decumbens. Interestingly, calves gained more weight per day when grazing on Brachiaria brizantha than on Brachiaria decumbens.