Mine does this as well. It will stuff pellets and krill in it's mouth till they are hanging out. I moved it to my eartheater tank and now he only gets bloodworms and cichlid crisps so its not as much of a problem. But I have to thaw the blood worms or he well swallow the cube and not let anyone else get any.
Funny that you mentioned your texas doing this peathenster. I have a female Escondido that eats like nothing else I have ever seen.