I think that all of the answers are possible. It is true that a 12 year old canine athlete has typically led a good life. It is also true the surgery is very expensive. In this case, it would not be a problem. The question to be answered is if the dog could have the surgery just how much more viable life would it provide minus the time to heal. What are the chances that with nerve problems that the surgery would not work? As we examine this case, we should all remember not to judge the decisions of the people who own such dogs in that there is so much to consider.