My new baby Leopard Tortoise seams to really like Mazuri. I try to feed him other greens, but he will only eat Mazuri. Can they get addicted to it? He'll take a few nibbles (tiny nibbles) at his lettuce here and there. He won't even touch his grass. So is he addicted to Mazuri? He's 4 months old and 2 1/4" long.