I know what it is like to unexpectedly lose a pet. When I lost my cat last year she went from seemingly perfectly healthy to having to be put down in a matter of hours. I don't want to relive all the details here but I know what you are going through. I still struggle with the decisions I made and wish I had had time to research the vet's advice. It was a vet at an emergency hospital that I had no past relationship with. I know I could have done things very differently in human medicine. I still have not read up on the treatment of a cat with her issue because if I were to find out I made the wrong decision, based on her advice, I would be pretty devistated. I find comfort in knowing I gave her the best life that I could in the time that I had her. That is really all we can do for the fur kids.