I tend to go for amputation. I did it for my very active 12 yr old. She had a terrific 6 months before OS hit another leg. But those 6 mos were worth every penny of the $3000 bill.
I took Diamond from NJ to OSU just so that Dr Couto could help me decided if 12 was or was not too old. He said age is just a number. He absolutely said that she could be a tripod.