If You Want to Know if Spot Loves You So, It’s in His Tail

My dog doesn't wag her tail. She sort of will push it to one side though sometimes. I'll have to see what side. She sort of "broke" her tail I think by chewing on it. It's just a little stump that hangs there.
 
I have a mini schnauzer and as some of you may or may not know their tails are snipped, but my sweetie's tail still wags a mile a minute when she is happy!
 
dorcell, I've seen dogs with snipped tails wag their tails, or even dogs with nothing but a little stump wag it. But my dog's tail is like it's dead. I just wonder if she's done nerve damage by chewing it so much. It's the strangest thing. Her tail just stays down.