growth and grain-free food

Question
Hi,
Our husky boy came from a show breeder, and boy, is he beautiful! He is, however, a lot stockier than other huskies I've had, very broad chested, and has a heavy walk and huge paws. He grew super fast, and at 9 months old, he is 62lbs, and 21.5 inches at the withers. (He is neutered.) Not fat, though, just heavyset and broad. Is this common? In terms of height he is well within the breed standard, but his weight seems to be too high already, and I don't think he is totally done growing yet.
When he was a puppy, we were struggling with his constant diarrhea, and I finally discovered that he did much better on grain free food, so he grew up on very high protein, high fat food. Do you think that might have made him stocky and heavyset? He is very healthy and active, and really packs it away (no appetite problems on this boy!) but I wonder if the food he was eating, which was about 40% protein, made him grow too fast? He is on another food now, also grain free, but with a more standard 25% protein, and it doesn't seem to slow him down any, though.

Answer
Keep in mind that some dogs are just "outside" of the standard.  While the standard is a pretty good indication of what to expect, genetics don't always cooperate and sometimes you end up with a dog that pushes things a bit.  My guess is that the food didn't necessarily contribute, but it is possible.  If the dog is doing well and doesn't seem to have an GI issues with the food and is at a healthy weight for his size, by all means keep things going.