If your dog doesn't already have arthritis, do the following as preventive measures:
1. Give your dog regular exercise throughout his life, which lubricates the joints.
2. Have your vet recommend healthy nutritious food and don't let the dog become overweight.
3. Raise your dog's food bowl so his neck isn't down while he eats. (It should only be a couple of inches below the dog's neck for comfort and to prevent bone problems.)
4. Start a glucosamine and chondroitin supplement for dogs when your dog is an adult, especially in a breed that is predisposed to have arthritis. You can get liquid or pill forms without a prescription, but, again, be guided by your vet's recommendation.
If your dog already has arthritis, these same tips can help reduce pain. Glucosamine and chondroitin help humans and canines with pain. Both will suffer more from arthritis if obese. As for exercise, keep it light, but keep your dog getting exercise to prevent stiffness. A dog with severe arthritis may need a ramp and to be lifted to a standing position after a nap.