I have 15 chicks that are now 5 days old in a decent side box that I have set up with an eco glow brooder for the heat source. Up until tonight they have all slept soundly underneath the heat and have been fine. During the day they are playful and are running around everywhere and are eating and drinking well. Tonight I noticed that instead of sleeping under the eco glow like normal, they are all huddled very closely together in the opposite corner of the box but sleeping well. I thought maybe they were too hot but they arent spread out like they are hot they are almost piled on top of each other. I dont know what's wrong and I'm afraid they will suffocate sleeping like this.(I have a security camera on them at all times.)
Please help!