I am so sorry that Casey has moved on, but I am glad that he is no longer suffering. You did the right thing, the humane thing and now he is at rest. I know your heart is broken right now...mine would be too. Give yourself a little time to deal with it and maybe take one of your more cuddly cats and spend some extra time kissing and hugging. They are medicine for sure!

Rest in peace Casey....

Love from us all...