Normally dogs would calm down and get distracted by other smells, sounds and activities. Sounds like he is in 'lock-down-mode" when he is angry. Don't think any kind of calming signal will get through to him Yes, but i am not talking about 'normal' dogs, i am discussing dog-aggressive dogs. and re: "calming signals will not work". Of Buddy's 4 styles of reactions, his world famous "Chihuahua reaction" is his MOST dramatic, just a heart-stopping, stunning, extreme reaction. read POST NUMBER THREE on this thread here: http://www.dogtrickacademy.com/members/forums/threads/ideas-on-helping-the-dog-agressive-dog.3595/ Dog-aggressive dogs are not well understood by most ppl, imo.