I can only pray that your second opinion is with a board certified surgeon. I have never heard of "rods" put in the wrist joint of a pup (the repair is different than that from what I know)....and I have had three vets give me the stats that I gave you...so that 5 percent figure did not come from just one. I have a lot of experience with fractures in yorkies and am very worried for your puppy and will pray it all works out for him. Of course 5 percent is not zero...but that number would scare me.
If you need to find a boarded surgeon, you can search here:
American College of Veterinary Surgeons
Best wishes to you and your puppy. Keep us posted please.