I know ome may laff at me but i had a nice day out with my kids oday, came home and fgound our bunny dead in his run nothing killed him, he looked like he had gone to sleep and died in his sleep. He had a tiny bit of blood from his nostril, but didnt look scared or anything. Nothing could have got to him, there was no blood anywhere, the run was locked. My youngest was sooooo in love with him, telling her was heartbreaking. We had him really tame he was more like a dog, house trained and everything.