puppy weight

We got Winston at 8 weeks and he was only 4.7 lbs....he is a leaner, darker golden but he was still much smaller than average. He is now exactly 7 months, and only 40 lbs. His father was 65 lbs, and his mother was 55, so I knew he would be on the smaller side, but I didn't think he'd be this...

I have a 9 week old golden... I took him to the vet last week for a checkup and he only weighed 4 pounds on the dot. He has normal activity and has been a picky eater, however I began to add a touch of water to his dry dog food and he has started to gobble it right up now. My question is- is...