I am now seeking profesional help Just earlier, we were all in the living room. Jazz, Emma, Eric and I. The room is huge. Well Emma was sleeping on the floor, across the room from Jazz. Jazz calmly walked up to Emma, and I mean calm and peacfull. I was keeping an eye on her though. Then she just grabs Emma by the head and shakes!! Now she's growling. I yelled at her and she let go. Emma ran away and Jazz got put in her kennel with me still "yelling" in my growly voice. I am also going to be purchasing a muzzle for Jazz. She continues to be fine at aglity class and wil people. She just cant stand Emma all of a sudden.