How old and have you weighed him?

I wouldn't feed him every 2 days, but every 4-6 is acceptable. If mine seem hungry after 4-5 days, I'll feed them. They are growing like weeds and using it all up so it seems.

If the fuzzies seem too big (and are leaving a huge bulge), you can always try and get smaller ones for safety's sake. I have a local rodent breeder and I ask her for smaller fuzzies (mouse hopper size) and she can get them for me consistently.