A friend lost his 18 year old cat recently; just 3 weeks after I lost one of mine. I can truly say "I know just how you feel" , since my loss is still so fresh in my mind.
He told me an interesting story: He buried his cat in his yard, outside his dining room. That night, he went to look at her grave through the dining room window. As he stood there, a beautiful red, male cardinal lit on the grave, looked up at him and then flew to the window sill and looked at him again.
He said, "I got a message, but I don't know what it is." I told him I thought she was letting him know all was okay. We both got teary-eyed, but I see this as a comforting message, don't you?