You know your dog is old when...

You have to drive him (two and a half blocks) to the dog park.
You are ecstatic when you realize that he's still breathing, though deeply asleep.
You use your mother's wheelchair lift to get him up and down the front steps of the house.
You have little pieces of yoga mat all around your house, to give him traction on your wood floor.
Your cat doesn't take him seriously.