Newf, unless something has changed, DD's--as a requirement to breed--have to pass an aggression test. I believe they have them kill a fox in Germany. At one time, I think it was stray cats here in the States. I had 2 of them go after my dogs several years back, totally unprovoked. The only DD I've hunted with recently (the others being wirehairs, which I think wirehair owners would say is a distinction without a difference, but DD owners would not) is not that way.
I've been around a lot more shorthairs and Britts, and haven't seen similar behavior. My most recent Britt was very much the opposite, in fact . . . except around my setter, which we got several years after we acquired the Britt. Two unfixed boys, I guess. But for whatever reason, the Britt did not like the setter at all--but that was the only time, over the 8 years we owned him, I ever saw any aggression from him.
