I don't think it should pose a problem for your older chickens. You only need to provide one spot that is warm for the chicks to warm up when they get chilly. You don't have to try to heat the entire brooder to that temp. This might change during the summer. Especially if you are in a place with really high summer temps.Hi, I am wanting to do the same thing - put my brooder into my coop. I can keep the layers out of the chick area, but I am wondering about an angle I haven't seen mentioned (so maybe it's not a problem)... Is the heat bad for my layers in general? I mean, obviously I don't want them close enough to get burned or anything, but what about just the heating up of the coop? I am planning to get chicks in the spring, so it won't be really hot weather yet, but I'm just wondering if I need to be concerned about this at all. Thanks!