Nanook picks berries right off the bush. he curls his lips back & ever so gently plucks them with his tiny front teeth. It's so cute. lol

To be on the safe side, I'd just give him a few a few times a day. Just watch his stools (and his body language) to make sure they are still normal & he is still acting normal. If his stolls become loose or very hard & dry I'd cut back a little if they are normal you can try to slowly increase the amount you give him.