My daughter says it's unfair our boy Mr.Pouce wasn't "famous on the internet". She's right. He was the nicest, classiest cat of the city. May he rest in peace.
(sh.itjust.works)
You didn't betray him, you did the opposite. You provided love, care and warmth until his last moment, and you saved him from terrible suffering. There is nothing even remotely treasonous about that. He would be proud of all the choices you made.