Hi Sonya, I have to wonder what on earth powerfeeding means. To me, its something done with a machine, like a caulking gun or something. A giant pinkie pump perhaps.
That is, feeding an animal more then it would consume on its own accord.
If a reptile actively hunts food and you allow it to find food, how can that be powerfeeding? In fact, feeding one up to the point of it not wanting food, could not be powerfeeding. Its simply feeding.
If you feed a reptile and it does not grow in a normal fashion. Then, its more about temp choices, then diet. A normal growth pattern is much like many other normal animals. They should grow long and thin up until they reach sexual maturity, then they should bulk out. This pattern is very common and should be easily understood.
If a reptile, in this case a monitor, grows short and fat, then its base metabolism is too low. Increase the temp range. If the monitor grows to fast for your feeding schedule, then lower the temps a little to slow down the metabolism.
When I leave to do a show or go on vacation, I turn off the heat lites so the monitors do not need to feed while I am gone. A temporary slow down.
To understand reptiles is to understand they have a range of metabolism, not a single set metabolism. Cheers