Came home from work last night and found that i lost 2 rabbits. We have two 100 degree days in a row and the night temps in the 80's. In the past i have rabbits that have handled it (or simular), not sure what happened. But the heat is deadly if precautions are not taken. Mine were in a opened on one side shed, with 3 inch air space around them. Really thought with the open front they would get the breeze and with the wide roof area (6 feet coverage for a 2 foot cage) would be sufficient to keep them out of the direct sun light. Guess i will never know for sure. The third one is fine and in the house now, for the duration of the hot weather. The only other observation i have is that the two that died, one was gray the other was black. The one that lived was white.