A Dog on a chain

 Have you ever seen one of those dogs?  Thick necked, barrel chested, pinch collar and taunt leash.  You look at him and think "that son of a bitch could go at any second!"  You don't want to make eye contact because you have no idea what might set him off.   But it is kind of hard to look away because you are just a little curious to see what he is capable of.   He's low to the ground but quick.  He's quiet, but you can tell a lot is happening behind his stillness.  His eyes are always moving, taking it all in.  Even when he appears to be calm, his body is slightly forward.
I know that kind of dog.  He is the kind of dog Ceasar Milan, the Dog Whisperer, would classify as a "red zone" dog.  He's the kind of dog that is very loyal to a few and has no problem taking out the rest.  He is fierce and hard to frighten.  He is courageous and will not back down.  He latches on and doesn't let go. 
In fact, I am married to that kind of dog.  But only on the job, only when there are people to protect. 
I never really made the connection until Danny's partner described Danny in the above way.  On the job, in the heat of the moment, my honey is a pit bull-rottweiler mix.  Latching on and not letting go!    And thinking of Danny in these terms actually makes me less concerned about him while he's on the job.  People really aren't afraid of other people in a lot of situations, but bring in a dog and people back down.  That is why K9's are so effective.  Danny doesn't have to say a lot, it is pretty clear what your options are just by looking at him.