I noticed a kink in my Henry's tail one day, and being a nervous new GH owner, took him to the vet. Vet x-rayed and said, "Yep. It's broken." There was no treatment other than pain pills if needed and watch to make sure it didn't become bothersome, infected etc. If it happened to one of my dogs today, I'd take the watch and wait approach as long as the he didn't seem to affected by it.