1. Reluctance to go on walks, or maybe on long walks.
As animals age, muscle mass and stamina decrease and they can’t always do their favorite things as long and hard as they used to. But they should still approach taking a walk with the same excitement they did when they were young. If your dog is being dragged on the end of the leash, or turning around and looking back toward home after a block or two, this could indicate he is in pain.
