The plugin tends to glitch a bit, leaving a player with two pets after a death. The second pet cannot be removed, and it doesn't have a name tag, but it will still follower the player. Secondly, the plugin will crash when respawning with a pet every so often, also crashing the entire server.

Just a note, the server seems to crash because of the duplicate pets when respawning/logging out with them

Do you have a log of the error? If not, nobody can do anything at all.

Duplicate #253