The Puffer Forum

I've had this porcupine for about a year and he was doing great. He seemed to get along with all the other fish, and never had a problem eating. But about a week ago all of a sudden he started refusing to eat. We pretty much have been forcing food into his mouth and it looks like he try's to eat but he spits it out...when I bought him, the pet store told me to feed him krill, so that's all he ate. And now I find online that krill causes lock jaw, but the pet store says they've never heard of that happening. Does anybody have any advice?? I love this fish and would hate to see him starve!! If it is lock jaw is there anything I can do?? Please help!!