Thank you for the prayers.
I took him to the vet for an unrelated problem and he had a very small growth on his back.(It had been the same size for about a year) The Vet looked at it and said , Yep he's getting old. The week after the visit the growth grew rapidly and burst open. They did surgery to remove it but she said a lot was still inside. An oncologist did some tests and they determind it was cancer. This new surgery will go in to see how far it has spred & what course of action to take. I've done some reaserch on this type of cancer, It doesn't have a good prognosis.