You need to go on YouTube and find "The Birdhunters by Turnpike Troubadours.Great picture of a happy dog. Sadly, getting old is the way of this world.
You just gotta love old dogs. When I got back home from Vietnam our Pointer was about 10. I put on my hunting duds and worked the shotgun action and he started bouncing around like he was a puppy again. We hunted the afternoon and got our limit. He retrieved every one. When time came for him to get in the truck for the ride home he couldn't make the jump on his own. I put him in and listened to the satisfying sound of his tail bopping against the floor board as he wagged it all the way home.
Now I wish I could somehow find the energy that he did on that hunt. Time gets us all in the end if something else doesn't get us first.