I have 4 peking ducks and they are about 3 weeks old(I think) just starting to get adult feathers in. I have 2 that pant and squeak especially at night. I live in Florida and they are inside pets. I do not use a light anymore as it gets to hot. They have a dish deep enough to get their beaks in and have at least 2 swim times a day. I don't understand what I am doing wrong any advice?