Twelve 2 week old chicks. It's 80 degrees in my house ambient temperate and inside their brooder with the light off it is also 80. (light off because I just cleaned their brooder). Should I still have the heat lamp on them at this point? It was 85 before I turned them off. They have been at 85 for over a week (90 made them pant). They are active, running around, not huddling...thanks!