Not trying to hi-jack the thread - this just seemed like a good one to pipe in on and ask - how do you know when your puffer is getting enough stuff to wear his teeth down? I've got a striped puffer - and he eats very well but so far I am also a no-go on the real hard shell type stuff....he eats whole shrimp - shell, legs, tail - the whole thing. But I am having no real luck with crabs and snails - he doens't bite the shell - he waits to grab a leg or tentacle and maims them that way - then pulls them out and eats them. I have seen him biting on his live rock from time to time - esp if I put in a new piece - and so far his teeth look fine (he's actually got a chip out of the front that makes me think he has been biting something rough) not too long or anything....but I don't really want to wait till I have a problem to ask.....what do ya'll think??
By the way, he's a striped puffer. I've had him for about a year.