Have to agree with Brandy. My bunnies like it on the cool side too. Got up to 89 in the house (too early for AC) and had to get fans to help them cool down. Plus humidity is a bummer. I even have a hard time cooling off when it's too humid.Rabbits tend to prefer things on the cool side. I have house rabbits so basically if I'm comfortable then they are comfortable. If I start to feel too warm (around 80F) I turn on the ac. It keeps the buns, gerbils, and people happy. The humidity levels also play a part. Hot and humid makes rabbits over heat quickly if they don't have help cooling down.