Bless your heart and your sweet kitty. I wish I had a pic to share with you, but our humane society has a tree legged kitty that is what we term a "keeper". She will never be adopted out because of her special needs, but she will never be put to sleep either. Lucinda (our tripod) leads a totally normal life and is happy, healthy, never misses a beat. You'd never believe it, but she's as agile as any other the other cats. And she's 12 years old. We have another "keeper" cat that's 16 years old. It's possible that by amputating vs. putting down, you will have MANY more wonderful years with your cat. I understand that you have to do what you feel is right, but I think I would try surgery first. I wish you luck and will be saying prayers for y'all tonight!