We had a similar experience when we took our Weinerdog, Anthony to Petco U. We took him there for socialization and to try and get him to become less obnoxious and be quieter around other dogs. He has never bitten anyone or any other animal but he barks constantly and tries to hump everything in sight. We gave him a stuffed dachshund named Huma but he humped the stuffing out of her after just a few nights. But Anthony got kicked out of class on his third night and they said that we would not receive our money back because it was our fault that we would could not keep him quiet and keep him from trying to humping everything in sight.
Gotta love that name... Anthony .. lol. Very creative. Creepy, but creative.