If you search back on the threads, I had a Lab, though young, about a year and half old, had a torn ACL, crippled, I did the surgery, this was 1988, and it was experimental, fiberglass strip through the joint, leg cast, three weeks, weeping through the cast, rejected the fiberglass strip, had subsequent surgery to remove it, more time in a cast. When the cast came off, leg was nearly useless, half the size of the other, three legged pathetic 75# dog. Really disappointing. Then it started to get better, little by little, he put weight on it, just a toe at first, then more, it took 10 months to heal. The dog lived to 14, hunted, never got arthritis, and never took another bad step. i would do it again, based on my previous experience. One thing for sure, I doubt you can live for a prolonged period with a dog crippled in this manner, suffering, without taking some kind of action. In 1988 it cost me 600.00, Lord only knows what it would cost now. Good Luck.