Hi Kathleen-
When dealing with a breed that can potentially have genetic related diseases, it is important to make sure that the breeder you are purchasing your puppy from is doing health testing on the parents and can provide you with health clearances on the parents and health stats on generations further back. Make sure you have seen OFA/PennHip scores clearing the parents of HD before committing to the puppy.
I would also say that if this breeder is still basing her feeding recommendations on an outdated myth, I might reconsider this puppy. This tells you that she has not continued to keep herself updated on current research, but instead goes with “what works”. What appears to work, does not always actually work especially if health testing is not being done.
While protein is a non-factor in the growth of large breed puppies, I still feel moderate protein levels are better tolerated by most dogs vs excesssively high. And yes, calcium and over nutrition should be the major factors being looked at when choosing a food. That being said, you will need to keep the puppy on the same food the breeder is using for 3-4 weeks and then slowly transition to the food of your choosing to prevent stress related stomach upset.
