She's a mixed breed rescue and pretty old. She has a number of health problems - impaired kidney function (managed by diet), high blood pressure - panting when hot or going for a walk, losing strength in her back legs (she's on supplements) but can still manage the stairs, reduced sense of smell / sight / hearing, loss of bowel control - she poos like a horse, just drops it out when walking along - more and more often indoors though fortunately it's not messy - a couple of times peed on a carpet (despite having plenty of access to the garden). On the plus side she still enjoys her food and trots happily around the garden having a sniff around. Recently her arthritis has got worse and sometimes she has difficulty getting comfortable. Often stands in the garden wondering why she is there.
She hasn't been to the vet for a while due to coronavirus and the vet stresses her now anyway. So my question is - how do you decide if and when to PTS? I know what the vet will say - that it's up to us. On the one hand I feel bad about ending a life, on the other hand we let our elderly cat go on for too long and I feel bad about that.