Toto was 1 lb. 8 oz. when we got her at 16 wks. She will be 3 yrs. in July and her weight yoyo's ... our vet wants her to stay around 3 lbs. because of her tiny structure. "Miss Piggy" right now weighs 4 lbs. 8 oz. and I feel like I'm starving her some days! She is a genuine "couch potato"!!