I've had ten years of owning and working a Slovensky Kopov. Its true they work OK with other dogs when hunting and make great tracking dogs. The many of the male Kopovs I've seen including mine can be aggressive to other dog when not hunting. My old cocker has a great knack of winding up the Kopov just with a little body language. My Kopov likes people and kids but seeing how quick his humour changes i would not trust him alone with either. He's the only one of my dogs i would not try and take away a bone he was eating.
Now for all those who think its not a good idea to have a temperamental dog, i have no kids living here and i live alone out in the forest. plus i know how to handle a Kopov.