Ours is starting to have a limp in her left front. Also 10 this year. Just giving her some anti-inflammatory meds, as she still seems very happy-go-lucky and runs after me with her ball as if to say 'don't put me out to pasture just yet'.
Looks familiar.
Our tripod cat has taken it upon herself to help me roll some toilet paper off the roll. Unfortunately, she is over zealous and sometimes I get a claw or two in my thigh.