If I remember correctly, our boxer mix was around that weight at 10 wks...he's 7 now, and about 65lb (still very fit and lean). He was kind of a small puppy compared to his littermates, and the rescue thought he'd only be 35-40lbs as an adult 😂 love my big boy. I do remember distinctly that he was 30lb at 5 months, and he just kept growing! He wasn't at his final weight until he was 2 years old.