Hi, I've had a porcupine puffer for about 9 months so far and he has been doing fantastic till today. For the last nine months I have been only feeding him krill because that was all he would eat. I tried everything else but he only wanted krill. He has always had a voracious apitite for krill. Today he went at the krill like normal, but he couldn't seem to bite it. He kept going for it but he couldn't bite down on it. I think that his jaw might have overgrown from the lack of shells in his diet, but krill still does have a shell. Although he usually does swallow it. I tried feeding him some brine to see if he'd take that, since it's smaller and it might grind down his teeth again, but he won't take that. COuld it be the fact that his jaw has overgrown? If so, How will I help him, or can I do anything. This is my most favorite fish ever I surely don't want him to die knowing that I couldn't do anything about it. Thank you