Is there any way to tell how big a puppy will get? like double their weight at a certain age? My pup is 36lbs right now and his feet are pretty big. His mom was 80lbs and his dad was around 78lbs. His mom has big feet for an 80lb dog and I had a trainer estimate him at 85lbs. Any guesses on what he will end up at? Pics are of Sire, Pup and mom, and pup feet as of today. I plan on keeping him petty lean once he is a year old.