@3aa33ca7 that sucks, sorry for your loss. I had one die yesterday out of nowhere. It got hot all of a sudden so maybe that. She was fine in the morning. Went to go give them some treats at 2pm and she was laying there dead. Weird. 
I run my hardware cloth out 2ft under the run, rocks over then built on top of that. I haven't had anything get in yet, knock on wood. It's always something ain't it 

 @9a8f090b
If it was always just one thing I would never complain