There is so much advice here to consider. First let me pass on some hugs to you and your pup. I have had two pups with osteosarcoma, unfortunately it was found after it had spread. In both cases, if it was found before it would have spread...by all means, I would have spent every dime to get the surgery. More factors come into play though, such as quality of life, is she in awesome health, her attitude etc....