Wise decision, my friend. There comes a time to quit. I'm 75 with an ankle that has been fused three times and broken twice. That means the knee on that side is shot and the hip is going. I have at least this season left, if I'm careful. Yesterday I took a friend out hunting sharptail. My friend is, in some ways, in better shape as I, at least as far as walking is concerned. Normally I would have quit when I couldn't take the pain in my ankle anymore, but yesterday my friend wanted to go on one last "walk". After picking myself off the ground because I couldn't feel my right ankle/foot and being almost totally lame this morning, I have come to the realization that I prefer to hunt by myself, as I have done for over 60 years, for the most part, and quit when I start to hurt. I hunt for enjoyment, not to win the race. I lost one dog in August and the new, and last dog is not quite two so she has a lot of years left that I won't be able to hunt her, but she's still my best friend. I suspect folks will occasionally see an OF with a young lab stumbling through a field or down an arroyo on occasion. If that turns out to be my end, so be it. Take care of the dog, love her and take her hunting.
Be well. Enjoy the memories!