My elderly cat is 21yrs old, she is now very unkempt and matted and a bit smelly. Obviously shes not as agile as she was, but can still get on the sofa, shes deaf as a post and yowls loudly (when she could hear herself she would meow very quietly)she still uses her litter box, she was never an energetic cat but now just goes from bed to bowl and back again, she vomits at least once a week. Her teeth are painful, I can tell by how she eats, and think she just doesn't look well and am dithering over taking her to be pts, however she still has a good appetite and eats and drinks well if she was off her food I'd take her straightaway. She has outlived her children who got to 16 and 18 and her grandchildren who all got to 18. They all ended up having a couple of days illness then full collapse then were pts. (All were out of hours emergency vets so the cost of that is also a consideration) I dont want to wait until its critical but dont know how much longer I should leave it. I knew when it was time for my other two cats, I just dont know about this one, I was all set to take her on Monday, but decided to wait, wwyd ? It's the good appetite that is clouding the issue.