I have 9 chicks that are 3.5 weeks old. They are in a large dog kennel lined with cardboard. I have their heat lamp hanging/clamped on the inside of the crate. The first week it was hanging a little lower since they needed the higher temperature, and the second week I raised it up as high as it would go from the inside of the kennel...they were happy and comfortable through this whole time...but now since we started week 3, I had to move the lamp over the top of the crate since there was no more room for me to move it up from the inside .....and they are acting cold? I'm not sure what to do here. Is it imperative that I lower the heat by 5 degrees even if they act cold like they did? They were peeping loudly all night and I felt bad, so I lowered the lamp back to where it was, and now they are happy again....what do I do here? I'm a first time chick owner.