Maximus' first trip to the vet after we got him, he was 9 1/2 wks old. I can't remember what he weighed then. His next vet appt, he was 13 weeks and it seems like he was 1.9 lbs, or around that. I took him yesterday for his last set of dystemper parvo and rabies vaccinations at 16 1/2 wks and he was a whopping 2.9 lbs!