While we were in the area, we took Pele to a very large, multi-acre off leash dog park that he had visited when he was a much younger dog to see if he remembered it.
He did: there was an area that sometimes had water in a culvert which wasn't accessible unless you were an agile fence-jumping dog, which Pele used to be. He is no longer up to jumping fences. In fact, he needs boosts to get in and out of the car at this point. But he definitely remembers it was there.
We did notice, however, that both his hearing and his eyesight are not quite where they were. Occasionally, when he got a little far away from us, he had trouble finding us again--even if we called him, he would get confused and look around and then run a different direction. (Some dogs do this on purpose, but Pele's main purpose in life is to be attached to our hips as if by Velcro.) It was a little distressing for him, and if I let myself think about it, it was distressing for me.
We had to go after him and tap him on the shoulder to let him know where we were, and then he'd get all excited that he found us. I think we learned that he is no longer the dog for multi-acre off-leash dog parks.
But I refuse to be distressed about…whatever this might entail about the mortality of canines, LA LA LA, it's not happening, I've never heard it. My dog is right here and he loves us and we love him, and so I will cherish his presence every day he is around.