Sometimes when I have an exhibit full of different babies(gorilla,lion,tiger,antelope,etc.) some of them would never drink because they act like they don't know which food dish to pick!Then when i put the thirsty baby animal in an exhibit all by itself it would start drinking water I again .
I had a baby gorilla that was surrounded by food dishes and the gorilla would go walking in circles and it never stops .Another animal that had this problem was my baby tiger(cub), it would never finish its drinks at the food dish until i put it in its own little exhibit .