That's why i say that every once in a while it could be more natural. Especially for catfish and other scavengers species.
I would think that in nature they wouldn't constantly be fed relatively small portions. But every once in a while they may stumble across a relatively large carcass which that will stuff themselves on until they've eaten as much as they can.
However day after day huge feedings, regardless of whether the fish is being "powerfed" can't be good. Except for maybe fry. Right?
Haha, but this is just my opinion, hopefully some of the more learned members will chime in.