I had this happen to my lab when she was 3, she is now 7. I saw about 2-3 vets, and they all said the same thing and recommended me to an ortho in my area who was supposedly great. I made the appt to see the ortho and started saving my pennies for the TLPO surgery. I took her in, the vet looked her over, asked me if I hunted her, and then talked me OUT of doing the surgery. She went through PT for about 6 months, and limped pretty bad for awhile, but its never bothered her since. Hers was ruptured, but not torn, apperently thats the big difference. It sucked for awhile, for 45 days he literally didn't want her to walk. She was on a leash, or in her crate 24 hours a day. I thought she was going to go crazy, but it all worked out in the end.