Mine wasn't a voracious eater either. In the beginning, it didn't seem like it really took in anything either.I have the same issue with mine. I’ve had it for a few months now and have hardly seen it take any veg matter outside of scrubbing the tank. I have tried pellets, discs, and fresh veg but it never seems to care.
Often I see it mouth the carn pellets but rarely ever swallows them. Hasnt grown a whole lot, just wondering if there are any tricks to get these guys to eat their veggies? Maybe threatening them with no desert or playtime or something?...