Home Videos LA Sheriff K9 John Cook EP 91 LA Sheriff K9 John Cook EP 91 Oct 13, 2021 comments off Tweet on Twitter Share on Facebook Pinterest This is my first link This is my second link This is my third link best police dogs blood hound bloodhound dog handler dog lover dog training dogs how police dogs are trained John Cook k9 LA Sheriff LASD K9 military dogs patrol dogs police canine police dog handler police dog training police dogs police k9 SAR dogs tracking dogs