My five day old chicks have a 60 watt bulb over them in one corner of their brooder. They seem to spend a lot of time cuddling under it and I'm just concerned they may be too cold. They do move around their brooder regularly and are happy to go over to their food and water which are at the other end of the brooder. They will also sometimes sleep or cuddle a few inches away from the lamp. Any insight would be great!