I don't know who said you can't teach an old dog new tricks, but they were wrong. Animal experts say older dogs and cats are quite capable of learning new ways to play. Slowly introduce new games. Try gentle toys that encourage mental stimulation in your pet. Since Honey Bear passed, I have been spending much more time with my surviving cats just letting them play. To my delight, I discovered one of my cats can actually "fetch." It is the cutest thing to see. I never could get the dog to fetch. Of all the toys I bought her she only took to one, a stuffed pink owl. Now, I happen to collect owls. They are all over the house. Perhaps she took to the owl because she sensed that I like them? Get tips on teaching your senior new tricks from your local shelter, your vet, a dog trainer, or the internet.