Lani,
I would agree with joanne here, that a vet physical exam appointment w/diet and care consult is your best bet for a prudent approach with your new puppy.
While not a recognized breed in the U.S. by the AKC — and, as you say, fairly uncommon — I would also seek out information from a reputable international/non-breed club that does recognize the breed.
Maybe try the FCI or French parent breed club (since Picardy is French origin, like Picardy Shepherds “Berger Picard” that I am more acquainted with as a herding dog person, lol!)?
Longterm, ethical breeders who show (conformation) or are active (competition/titling) in their breed’s activities/work, are typically a wealth of knowledge for how to care for the puppies, including growing nutritional needs. They will know which health issues are a concern for your breed and the role nutrition plays (along with other care). Contact with top show and working breeders, handlers, and judges in my breed club has always been tremendously helpful.
Good luck with your puppy!
