This is irrelevant for me as a wizard (except from a sentimental point of view, of course!), but another wizard friend and I have noticed that with two tamed turtles, both on "stay", if one of us crashes, our own turtle will kill the other's. It will also turn aggressive towards PCs.
Not sure if this is the same for druid's pets and if it has to do with the change of status upon death, or if it's a bug. If it has to do with the status, maybe it would be worth it reconsidering...
In any case, rest in peace, my poor turtles! We never meant you any harm.
From memory there was an issue with Water pets, when logging out they turn wild again. I am not sure if it has been fixed or not, but this may be the issue. (I remember a while ago Jinker showing me a water stable, but cant remember if it ever got fixed)