I have taken my female to the vet almost every week since she was 8 weeks old up till about 4-5 months. Then Once monthly for weighins. I wanted to keep track of her growth so i would know what to look for in future pups. So far I'm very pleased 10 months and a TRUE 84 lbs... So i can't WAIT to see what she looks like at 2-3 yrs of age... Gonna be interesting.