I've been having an issue with my dogs. Specifically, they keep dying while locked up tight in my fortress.
I've got a few levels, each three blocks high. As I'm going up and down doing stuff, my dogs follow me, but occasionally I hear one die rather quickly. My first thought was to blame Endermen, since I am building three high, they can easily have the run of the place. However, after placing a command block to zap those creepy dudes from existence every few ticks, the problem is persisting. Nothing else can spawn inside, I've checked and re-checked every nook.
I then had a bit of an epiphany:
(Don't mind the command blocks, they're just a convenient mode of transportation as I work on a very large adventure map I'm building - the lava was just an experiment with using lava for lighting)
Is it possible for pets to accidentally teleport into lava while trying to follow you? I can't figure out what else is killing my dogs so randomly.