I have an 8-year-old Cavalier, who's in good health - mild-moderate heart murmur that hasn't worsened since he was diagnosed 18 months ago. I've noticed that he's started finding the stairs a challenge (we live on the top floor with 4 flights of stairs - he used to bound up them but takes them more slowly, one paw at a time now, and I carry him if he's reluctant) and has a very deep sleep after an off-lead walk. He's just generally become a bit more sedate when I let him off the lead over the years, but does still run fast at least once each time.
I'm finding it really hard to see my boy getting older :( I didn't realise it would start this young. I will also ask the vet about it as it could be his heart - although he was scanned recently and there was no change.
I want to do everything I can to give him a comfortable older age - what are your older dog tips? When did you notice the slowing down?