I've had a few Bettas before the one I have now, and have never encountered this problem. As you probably inferred by the title, my Betta won't eat! Mind you I've only had him for four days. I have tried Zoo Med betta pellets (but the nice folks on this site told me that that food is junk) and have since moved to Omega One Betta Buffet along with the occasional bloodworm. Still, he's eaten nothing. I keep track of exactly how much food I put in, and exactly how much food I take out after about a half hour, and like I said before, this dude eats nothing! At first I thought it might have been because his water was too cold, so I got a heater for his tank. It's now at 78 degrees. I don't think he'll starve to death for a while but it would be nice if he ate something.