If you think a Pincher has hunting instincts towards small quick furry things think about a Jack Russell
. As precautions we have to seperate them, I know how determined and stubborn he can be...I have a petstore cage at the moment and I have let him in a few times to see what he was like - with my watchfull eye and everything closed, he just stared but I still wont ever let him in my room with C&C cages which I'm getting soon.
I also have a rotti x alsation and she too will rush outside after the pigs have been there and sniff around, thankfully she is highly trained so if somehow - highly unlikely she got into my room I think a shout would bring her out before she even saw the pigs...
I have a gate at the end of the stairs, my bedroom door is closed when we aren't here incase she gets over the gate (possible), and open we are here and shes not interested in getting up. The Guinea Pigs could not be brought down here as when we go out the Jack Russell is in the living room alone and the Rotti in the dining room alone, and I wouldnt trust either of them with the pigs. They are alone because the Rotti could injure the Russell if they play and we arent supervising.
As for shock collars, they are definatly a last resort - and by that I mean if I saw someone using them in a situation that wasn't life and death I would have to say it's cruel. EVERY method should be tried before cruel methods come into place. Shock collars should NOT be promoted in anyway, especially on a public forum, TV etc no matter how skilled a person is in using them or how safe they claim they are. They are sending out the wrong messages to people who may not understand the device and could get one, thinking its fine and end up hurting their dog either mentally or physically.
As for Miller, he certainly is not God's gift for dogs.