Tell us more. What is the water temperature? How old is your feed? Are you feeding the other fish species too?

If your water is still rather cool you fish may be eating but can't digest the feed. If so you need to back off on the feed. As said in a previous post another possibility is could have old feed. If there is mold or fungus in the feed it could kill your fish. Do you look at the date on the bag? Your really shouldn't use feed more than 3 months after the date on the bag.

If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.