Don't know about your hogs, but mine grow insanely fast. I had an albino girl go from 42 grams to 200 grams in a couple of months. She's only fed once a week, and she doesn't even look very thick (compared to most of my other girls).

The only ones I have that haven't grown fast are ones that are irregular feeders. I have one girl from '08 that already got passed up by my '09 hatchlings.

As for shedding, I don't know how often would be considered normal, but my '09s have only shed twice so far and have grown quite a bit in between sheds. I don't see why it would really be anything to worry about either way. If it eats and drinks, it's fine regardless of sheds.