always hard to tell! my bentley was 1.5lbs at 4 weeks (LOL) .... he was sooo adorably chubby! he only had one other littermate so they both ate well
he is almost 6 months old and weighs exactly 3 lbs...he is really solid and not scrawny at all ... he really slowed down and grew into all his puppy fat & skin
he really had fat rolls and could barely walk when he was a puppy - he mostly waddled hehe!