That's odd. My 3 Jag's would eat basically anything. They'd eat pellets mostly, they had to be the larger ones, they'd ignore anything too small. They also loved all the different bugs you could buy for reptiles, Crickets, Earthworms, Mealworms, Superworms, Waxworms. They also loved Bloodworms sometimes. I never really fed them any live fish until they were about 5 or 6 inches, after that, they'd get feeders occasionally, like once a month or something, they always got excited. They grew pretty quick on a primarily pellet diet.