We brought our new puppy home today and we were worried about our current dog being somewhat agressive(not mean, more dominate).

It was the other way around! She started snarling and barking at him! We tapped her on the nose and that stopped her for a second, but even when he (our older dog) is being gentle and just sniffing or even walking by, she snarls at him. We keep tapping her or stomping on the floor to stop the behavior, but I'm not sure whats going on! This is completely opposite of any other puppy experience I've had!

Backround on her- she was one of seven mini schnauzer pups, she seemed to be pretty content and happy at the breeder's, I didn't note any agression in her and I was there for 2 hours.

They are both mini schnauzers. Is there anything we can do to stop her agresion? We understand she may be frightened and we tried to let her figure the kitchen/livingroom area out herself, but she keeps snapping at him.

I've never delt with this before, please help!