the only reason I thought heat was an issue is that I ordered 25 chicks, and 4 were sultans, 4 were polish, and they were the ones that were falling over, doing exactally what you described.., I lost 2 sultans and 1 polish when I called mcmurray.. all the other chicks seemed fine, when I made it warmer for them they all stopped falling over, and the other chicks were still fine. I hope you find out what happened with your chicks.