I posted this in the WTF but wanted you to see this:
Meagan, OMG. Years ago I went on a walk with my samoyed and my friend's pug. A collie attacked both of the dogs and bit the pug's tail. The pug's tail went limp and didn't move for a while. Took her to the vet, but the pug eventually regained movement in her tail. They say it was just a shock. I truly hope it'll be the same for your dog. But OMG that's terrible. Poor dog!
Also wanted to see how your little dog is doing today? Any better?? Thinking of the dog today!