Last year, the little chi that I had, his name is Mikey had a broken leg. It sounds like the same bone you are describing. They told me that he could have the surgery or we could try a splint. I opted for the splint b/c I was so worried about Mikey going under anesthesia, he was maybe 2 or so pounds. He wore the splint for about 4 and a half weeks. It was a pain b/c if it got wet or if he chewed on it we would have to go to the vet and have it changed, but the bone healed perfectly. He has full use of the leg. Wearing the splint did not phase him, he would try and run around.
Good luck, keep us up to date.
Good luck, keep us up to date.