I agree...however, we lost Casey in 2017 (tumor on her spleen; we had her spleen removed & were hopeful. Not meant to be).Old dog and a young dog. Good move. Former can teach the latter new tricks. When Casey starts slowing down, you might want to organise a chill out space for him. We let the old dog indoors. But puppy got to wait until s/he is the old dog.
May not be tactful to mention, but the OD/YD continuity takes a lot of the sting out of it when the OD passes on.
We just lost Cody last month (apparently, a tumor on his spleen began bleeding. He was almost 14).
We said "No more" & I was, I guess, OK with that. I was at the point where the pain is not worth the reward.
Things do happen for a reason. My wife said "...we only live once. WTH".
1 day in & this guy is a handful!