 Things that might make him less able to kind of bounce back from activity. But, you know, I recommend up to an hour of exercise a day for a normal, healthy dog. So for me, I would feel better having you take this little guy to a vet and just have a couple things checked out. There are some things that do come to mind. Those first two things I mentioned, you know, joint problems as well as weight. But, you know, I would definitely want to just take a good listen to his heart. So we'd want to check that out by...