Have had dogs and cats most of my life. Dogs have always stayed away until right when attack is over and then come out to comfort, they just seem to know. Just said good bye to my cat a few months ago, I should probably get another. She was a tough cookie, would never run off and stay near, but not too close. She would always seem very composed even when I was hitting my worse. I know you could train dogs for just about anything but for CH I think it would take many years and not sure if it would be a benefit.