I'm not lying. I suspeacted that maybe it was due to his extraordinary "nose", that he could sense something different.
The last draw was when he leaped over the fence to confront a local black man walking past the house. The man called the police, we were warned, etc. The police commiserated with us -- acknowledging that some dogs are just that way.
I now have another hunting dog -- a brittany spaniel -- and have no problems in this area.