I think you should follow that last sentence with a description of why that matters. I know by inference, but some may miss your point that by “killing any dog that pisses them off” they were selectively breeding for obedience to the alpha to the exclusion of all else. And then maybe extrapolate on how that trait translates into fierce loyalt to one individual which makes everything else a potential target for attack.
Take my love
Take my land
Take me where I cannot stand
I don’t care 'cause I’m still free
You can’t take the sky from me