[anonymous]

I would go by what a veterinarian that has examined your dog recommends.
I would not give over the counter medications or supplements, unless the vet approves.
I would consider making some diet changes as he probably can no longer tolerate raw and would do better on a bland commercial food, but first take him in for a vet visit, labs, senior workup.
There is probably a lot you can do under the guidance of a vet to keep your dog comfortable.
Best of luck.