Have you taken the dog in for a annual checkup that includes lab work? Is the dog a senior?
What did the veterinarian that examined the dog recommend?
Otherwise, it is all willy-nilly. No one can advise you appropriately, nor should they try. The dog’s age, medical history and such, have to be looked at by a veterinary health care professional.
Obviously you have specific concerns….please find a vet that you trust. Good luck.
Ps: Blanket recommendations for diet don’t work, every dog is different. I can’t help but to think that you are looking for medical advice here, in lieu of consulting a vet, if so, that’s a mistake (imo)
