HI there! I have a female Dobe along with a boxer mix and an aussie (and 3 cats) and everyone gets along fabulously! Of course, alot is to be said for socialization and training. I don't have much knowledge in Schutzhund, however it is my understanding that right now dobes are the underdog for such competition, as far as popularity is concerned. But these dogs are absolutely capable of competing successfully!!!!! Best of luck!!! As far as breeders are concerned, I know that infodog.com has some information as well as Doberman Pincher Club of America for breeders. My girl came from House of Hoytt and I couldn't be happier with her!!