You know the thing about any surgery is bad things happen. I know a 12 year old in Amarillo that died during a tonsil surgery. Bad things happen. The success rate for tightrope and tplo are both really close. The percent of complications are lower on tightrope. 60 % chance of blowing the other knee? Well my dog has been 3 legged since Sept. So the other knee is pretty strong now. I think that might be an advantage to waiting. You build up the other leg. Maybe I am wrong. We will find out.
I have a great big Indian blanket that I am going to put on the floor in the house, so he can walk easier.
I would love professional physical therapy, but I don't see that anywhere as an option. We could use one of those in the neighborhood.