A "dog nutritionist" is a person who specializes in providing advice and guidance on what food and nutrients are best for dogs to help them stay healthy and happy. Full definition
Consult your vet or a certified dog nutritionist for personalized advice about meeting your puppy's nutrition, calorie and special needs. (dogcare.dailypuppy.com)
If you want to feed beans as more than just the occasional snack, work with a veterinarian or holistic dog nutritionist to develop a meal plan that is sound. (wileypup.com)
It is however important that you ensure that your dog is getting a fully balanced diet, so chat to your vet or dog nutritionist first. (dogfoodking.com)