The best thing you can do is make sure that your dog is at either their ideal weight or a bit on the skinny side.
A journal article in 2006 found that dogs fed a restricted diet did not develop their first signs of arthritis, by X-rays, until they were12 years of age. Dogs fed ad-libitum, and therefore overweight, developed signs of arthritis at 6 years of age.
This is an amazing difference! Keep your dog lean and mean is a very good idea. Especially in large breed dogs that are prone to elbow and hip arthritis.
At Vetora our nurses can weigh your dogs and make sure they are the correct weight. We have a range of diets to help with weight loss and the management of arthritis.