I had to put the last of my 2 cats down 6 months ago. He was 11. It was strange, one day I came home from work and he was quite lethargic. I took him into the vet when he started panting (gasping for breath) and they told me he most likely had congestive heart failure.
The day before he was fine, and the next I was forced to put him to sleep. It was a bit traumatic to say the least.
It’s amazing how attached we become to our pets.
The other one died of intestinal cancer about 2 years ago. That wasn’t enjoyable either.
I still haven’t gotten a new cat yet, but I’m thinking about doing so soon.
It’s hard. My 19 year old developed a nose tumor and was fine up to two days before I put her down. All her organs were fine until then.