My lovely old boy (18) has been poorly for the last week or so - has more or less stopped eating, mostly sleeping or just sitting. He has hyperthyroidism controlled with medication and arthritis but had otherwise been doing ok up until now. Took him to the vets a few days ago and he had a gentle check over but there was nothing obvious and we decided against any invasive testing at his age. He had a pain killer and antibiotic injection to see if either would help him get back on track.
He still isn't eating barely anything though, despite lots of tempting dishes and is gradually losing weight. He is still drinking a bit but not weeing much so must be getting dehydrated from not eating. But he doesn't seem to be getting any worse or to be really unhappy - he is enjoying a little fuss when he is awake and has had little potters in the garden when it has been sunny. I feel that it's not time quite yet.
But similar happened with his sister 4 months ago, although she was much more withdrawn, and we had an appointment for her to be PTS at home but she crashed that morning and had a horrible last half hour with struggling to breathe whilst I dashed her to the vet. I obviously don't want that to happen for him if I can help it, but similarly I don't want to rush the end if there is a chance he will rally.
I know there is no easy answer - just wanted to write it all down I think. I am still struggling from losing his sister so finding it so hard to decide what is best for him.