Yes! My Cody had both knees done, 6months apart. Once they tear an ACL in one knee, more than likely, due to the weight pressure on the other knee, that'll have to be done too. Jackie and I were just discussing the price, and each knee was $1000 , including anesthsia, meds, overnight and follow up visits. Not to make you feel worse, but altho your dog may not yelp, it's a very painful condition. Altho Cody lost almost 30 pds after the first procedure and kept the weight off (my fault) he originally tore it slipping on the floor running to the door, so weight doesn't help but not always a factor. It's the most common orthopedic dog surgery. I feel awful that you're in such a precarious position due to finances. Yes, Cody had hip dysplsia anyway and did develop some arthritis in his right knee in particular, but aspirin and Cosequin helped immensely. If your vet is nice enough to do payment plans, and some aren't, it would behoove you to make arrangements for the much needed surgery, or your dog will be permanently disabled. I feel for you and am not making judgements on your character, but I would have cut off my arm if I could have saved Cody from cancer.