She's 18-19, spent a year in the CPL cattery (all her kittens were adopted and as she was mostly feral no one wanted her) and she had massive issues. For the first 10 years she lived with us she largely lived in the utility room and couldn't be shut in or held - but would come and visit you in the downstairs loo and allow you to stroke her (within limits).
The last year she decided to spend time in the sitting room with us and got more affectionate. We knew she had kidney disease and had a couple of eye bleeds this year, but today shes woken up and her back legs are collapsing under her. The appointment is made for this evening for her to be PTS.
She's not been much of a pet as such, rather a very grumpy lodger who complains about the service, will stalk off if the food isn't exactly as she wanted (and who knows on any particular day what that is), and generally hates the world. But I'll miss being yelled at by her