I'm curious as well - wouldn't vets advise against switching foods if this were the case? It's been my experience that vets are anxious to get you onto the food they sell...
...feeding ProPlan and both advised switching the puppies over gradually to what I'd like to feed, with the main concern being runny poop from too sudden a change. Neither mentioned a possible growth impact...
Do you have any scientific literature to back up that assertion?
EJHUNTL: It would seem that you and I are thinking along the same lines. It would seem (to me) to be a serious breech of a material piece of information for a vet or a breeder to not be aware of and/or disclose facts that could effect the healthy growth of a puppy. I guess I could understand a breeder not being aware of all of the effects of a feeding change, but it would be more difficult to understand how a vet wouldn't be aware of this if it is true.
As EJHUNTL has said, if anyone has source information that they can cite, I too would love to see it. It's not that I doubt the assertion, but for something this important, I would like to go to the sources.

