I have a 2 year old rabbit that was perfectly fine this morning. When I got home this afternoon around 5 I noticed he was acting a little strange. His food bowl was still full and he was being lathargic. I checked on him every 1/2 hour and his condition did not seem to improve but he also did not seem to worsen. I just checked on him again and he has died. Can a rabbit have a heat stroke? It has been nearly 100 degrees for the last few weeks but he has been just fine. Anyone have any ideas what could have happened?