Another angle with the bb gun if you dont want to pop em everytime is to get a piece of tin and lean it next to the kennel.
When they go to howling shoot that tin and it will usually send em in the houses. If not go back to wearing them lil butts out with it and then go back to tin.
Yep, 1/2 the time i dont even shoot at them, i shoot at one of their plastic barrels and they all get the idea.
"the sun is shining somewhere in texas" -Jason Boland