If nothing else, get a second opinion and even a third. My Puddy was born w/a bad leg; now I can't recall the technical term for it. But the vet wanted to first put her to sleep, then he reconsidered and wanted to amputate. I took her from another family and had my vet check her out. That was 13 1/2 years ago, no amputation. I know that their situations are not similar but my point is that a second opinion changed Puddy's future. I feel really bad for your little guy and I hope this gets resolved soon. Thank you for taking such good care of him.