I remember feeling that way when Cheyenne hit 10 years old ... it was such a shocker to think my once wiggly-puppy baby was in double-digits. :yikes:
It does get you thinking ... and yes, you worry about them more.
But still acting puppyish in play is great!! Cheyenne did the same at 10 and well beyond ... and she lived to be over 15 years old and healthy 'til the very end. (Albeit with a joint supplement in the later teens.)
You're
gonna worry more ... can't tell ya you won't ... but remember to enjoy him more than worry. Did that with Cheyenne and never regretted a minute.
In the meanwhile, Happy Birthday to you Ares!! You've now reached two whole paws old ... five circles on one paw and five circles on the other!!