cat lover

I always try to answer questions here and now my own GSD is sick and I am going to loose him.Just found out yesterday he has cancer all over.there is nothing they can do.He is not in pain to look at him he does not even look sick.the vet said he will probally quietly pass away in h is sleep when the time comes.I did everything right.never missed a appointment all his checkups all his shots teeth cleaned every year the best dog food you could get.This is why I always preach to please please take your dog or cat to the vet when they are sick instead of relying on what total strangers are telling you.It could be anything from something simple to very serious.Please keep my GSD in your thoughts and prayers.