Hi. I have searched the forums and read thousands of posts and need some direction. This is my second group of chicks to raise. First group of 10 did great no problems. I have 3 chicks. I got them from Atwoods. 1 is a RIR (Georgia). 1 is black and yellow? They are the same age. We've had them two weeks but the black & yellow (Hazel) was smaller in size. I also have 1 that we've had for 5 days and she is about a week younger. (chicken little) We are brooding them in the garage. I've had a heat lamp on them, but the days here in Texas are getting to 90+ degrees. I'm having pasty butt issues with chicken little & Hazel. (CL is the worst) ACV in the water. Clean brooder. Medicated chick starter. Cleaning bottoms multiple times each day. Putting coconut oil on vents after cleaning. I think they may be too hot. I'm wanting to remove the heat lamp during the day but afraid to make the leap. What do you guys think??