Black moor exhibiting strange eating behavior--?

I recently moved my beautiful black moor, Google, into a bigger tank because my parents had been keeping him in a one gallon tank with horrible water condition while I was away at school. At first I had some concerns about his health, including white spots on his front fins and head (which I later discovered were actually breeding stars), some fin and body damage (likely caused by trauma from his old filter, which had a tendency to float and expose rough edges) and what appeared to be problems with his swimming bladder (floating vertical on the surface with his tail sticking up).

Fortunately, he seems to be improving rapidly with the new aquarium and better water quality. Tonight, though, he exhibited some strange eating behaviors that I've never seen from him. I gave him the usual amount of pellets and as soon as they hit the surface he attacked them as though he were ravenous, like he hadn't eaten in days. Confused, I gave him some more which he consumed with equal ferocity. He probably ate four times the usual amount of pellets by the time he was satisfied.

I have no idea what could have caused this interesting feeding, because I have personally fed him every night for the weeks that I've been home. He doesn't at all appear to have lost weight since being in his other bowl.

What could elicit such behavior from a goldfish? Could it have anything to do with his increased level of activity in his new tank? Could this be a sign of a more serious problem I should look out for? Should I increase his pellets? Any help would be greatly appreciated.