Chennai: At 11am each day, fresh fruits and vegetables arrive at Arignar Anna Zoological Park in Vandalur. By then, zoo staff are already stationed at the preparation sheds, sorting crates according to a fixed summer protocol that kicks in as temperatures begin to climb.Unlike routine feeding cycles, the hot season demands customised diets, especially for herbivores, and turns feeding into a labour-intensive process.Every fruit is washed, chopped, and portioned based on the species, age, and feeding habits of the animal. The pieces are then frozen into ice cubes and balls—varying in shape and size—to serve both as nutrition and heat relief. Before distribution, each batch is examined by the zoo’s veterinary team.Sloth bears receive the largest fruit ice balls, with their feed mixed with generous quantities of honey, which the animals consume eagerly. “We will add a large quantity of honey to this fruit ball, as the bears are fond of it,” said Zoo Director Ritto Cyriac. Other herbivores receive fruit combinations with electrolytes to support hydration.The approach is not uniform. Indian gaurs, elephants, rhinos, and hippos are given additional mineral and probiotic supplements. Spotted deer and similar ungulates receive herbal liquids and mineral powders. Smaller birds get vitamin and amino acid solutions to prevent heat-induced stress.Carnivores follow a parallel system. Large cats are given up to 2 kg of raw meat frozen into ice blocks. Smaller predators like foxes, jackals, wild dogs, and jungle cats are served 250-gram meat ice packs. These allow feeding to proceed at a slower pace while reducing body heat.With each species requiring separate feed plans, preparation extends beyond a single shift. Staff coordinate across nutrition, animal behaviour, and veterinary teams to adapt to daily needs. The goal, officials say, is to manage thermal stress through controlled diet adjustments when other cooling infrastructure—like misting units—is not in place inside enclosures.