Buddy had an osteosarcoma which does not have a good outlook. Even with chemo he may not live another year, but then he may beat the odds. In any case he is living like a king. He is treated with carboplatin every three weeks for 4 sessions.
It is amazing how quickly he is adjusting to the loss of his leg. Set the family into giggles a few times trying to figure out how to pee. Rumor has it he tried to balance by using his nose. He is chasing the ball and like Romeo just a happy little guy.
I don't know what part of the country you are in, but my son is taking Buddy to Southeast Veterinary Oncology in Jacksonville, FL. My son says if he ever is diagnosed with cancer he wants to be treated there.
I lost my "heart" dog, George Washington, 2 years ago to hemangiocarcinoma. He had 2 chemo treatments that may had helped a bit. It was about 5 months from diagnosis to the end. The wonderful canine oncologist responded to my many questions very kindly and told me often that when the time came, my dog would let me know. And that's what happened. He stopped eating, then drinking and then moving and then he gave me the look and it was time.
There are 3 corgis in the house now but I still cry once in a while over George. Good luck with all this and believe me, everyone invovled will know what to do and when and why.