Chicks usually cry when they're cold, are they huddled up on each other? When the get way too hot, they get lethargic, first they spread out to the sides of the brooder to avoid the heat. If it's not any of these things…I'm not sure. Wish I had an answer. We had a LOUD chick this past spring, LOUD as in….keeping everyone awake at night. Our solution was to pop her under the broody hen. We lucked out, it worked. I've been using an Ecoglow as a warmer instead of the light, and it seems to keep them quiet. I think it's because it's dark at night and light in the day, so they're awake more when we are, instead of all the time on and off.