Very sorry to hear the news.

We’ve lost six Golden’s over the years due to various cancers, some very aggressive and others that were fairly slow growing, and a seventh that we’re dealing with right now.

We’ve never dealt with oral cancer, so can’t say much there, other than wait for all the tests and pathology results before deciding what to do. That is, unless the tumor is very aggressive and the answer is obvious. Hopefully it will be benign, or your Vet can get a clean edge without having to cut too deep.

Best of luck to your dog, and yourself.