I have noticed that pheasant, quail and chukar hunting beats up the old dogs pretty bad with respect to their joints. That won't stop them, which is part of the problem. Only hunting them half a day, though, really helped with their recovery for the next hunt. Unfortunately, it is hard to do in California, particularly in October and November, because you can't really kennel the dogs up in the car due to the heat. Easier to do with a trailer or camper nearby, so you can control the temperature for the old dog.