*fumbles in Sam's box and pins bow on flr's stiff thing*
chinchs are prone to teef trouble. I believe its something to do with a calcium defciency - their teef can grow sidewards and rub against their mouth, so they dont eat and eventually starve to death 
Is usually phenomenally expensive to treat and invariably is just a matter of time until it occurs again and being over 11 years old, he's no spring chinch