I'll believe it if I see it" for dogs translates to "I'll believe it if I smell it." So don't bother yelling at them; it's the energy and scent they pay attention to, not your words.
Cesar Millan, Melissa Jo Peltier (2007). “Be the Pack Leader: Use Cesar's Way to Transform Your Dog . . . and Your Life”, p.11, Crown Archetype
