I have a 10 month old boar who is still under 2 lbs. I know he's not done growing, but is he kind of small for his age? I'm not worried about him, he eats like a champ (Oxbow Cavy Cuisine, Kleenmama's hay, fresh veggies). Maybe he's burning a lot of calories from his daily zoomies!
Edit: I just checked his weight chart, and he's only gained an ounce in the past 2 months. He's currently *just* under 2 pounds.