http://www.animalplanet.com/pets/about-bully-breeds/ origin and history as bull herders Animal Planet http://www.animalplanet.com/pets/about-bully-breeds/ Animal Planet bully breeds アニマル・プラネット “bully breeds” “bully” breeds Animal Planet Animal Planet bully breeds http://www.animalplanet.com/pets/about-bully-breeds/ Animal Planet Animal Planet bully-type Animal Planet http://www.animalplanet.com/pets/about-bully-breeds/ http://www.animalplanet.com/pets/about-bully-breeds/ "bully breeds," “bully breeds” http://www.animalplanet.com/pets/about-bully-breeds/ http://www.animalplanet.com/pets/about-bully-breeds/