My three 5 week olds chicks are usually very active and getting into trouble, but yesterday, it rained practically the entire day. Now, they were inside of the coop with the 10 week old chicks and when I came to check on them the next morning, they were in the corner not moving and not very active. What should I do? I brought them in the house so I could warm them up. They are eating and drinking well but they seem to stand for a while and almost fall but they pick themselves up.