New killer lake house guard dog

You better be careful if you dare take one step on our lake house property because we have a new, killer, guard dog.
None of that is true, but we do have a dog living with us now. Bully, a soon to be 12 year old Llewellin setter, was a gift from me to son in law Ryan when he was a puppy.
He now has complete control of his new house and the two people he allows to also live there (Me and Mel), has his favorite piece of sitting (sleeping) furniture and is loving being an inside dog. While we have had a couple of incidents, he is training us well.