I just took the baby, Rocco to the vet yesterday and he weighs in at 15 lbs. Its funny bcuz Maxx and Evey both weight 7 and 8 lbs so it is cute when they all sit together, its a stair step. But Rocco is 8 months old and Maxx and Evey are 6 & 7 yrs old and even though Rocco is twice the size of my older ones, it is SO obvious he is the baby!