ive had my male betta for several months now when i first got him he would gobble his pellets right up but recently in the last several weeks he doesnt want to eat he ignores pellets the only thing hell really eat is some worms i bought for him at the store he usually gobbles these up hes always swimming around and seems like a normal healthy betta besides his little only eating what he wants when he wants behavior what can i do to get him to eat more regularly is this a sickness or just a super picky fish