Oh this is a nice story. Many animals seem to do just fine with only three legs, even those who at one point had four. They don't seem to miss it, just adjust to life with three. Your little guy looks fine, better you didn't decide to put him to sleep. I saw on Animal Planet once a dog who only had two legs, both on the same side. He was running all around, he just learned how to balance on his two legs. He was big, too a Golden Retriever. That encourage me that if I ever had to make that choice, I would, too, because I have seen how well they can do. Good for both of you!