I assume you mean 'warm". They need warmth like many animals do, especially young ones. Instead of feathers, baby chickens are given down which gives them a fluffy feeling. They start to grow...
Yes. It is best to use warm water. Use a very mild soap-like baby shampoo or cat shampoo. Wash them very gently with a fluffing motion of the feathers. The bird will not like this process so you may...