Enticing nonhuman primates to forage for their standard biscuit ration

Abstract 10.1002/zoo.1430120308.abs Ordinary feeder-boxes for macaques were converted into food puzzles by remounting them onto the square mesh (22 × 22 mm) of the front of the cages, away from original access holes. Feeding a standard ration of bar-shaped biscuits (40 × 24 × 16 mm; Purina Monkey Chow #5038; 236 g per animal), 8 […]