Rule 34 Dev - anthro armpit_hair axton balls body_hair border_collie canid canine canis collie domestic_dog erection fur genitals gradient half-closed_eyes herding_dog heterochromia hi_res knot licking looking_at_viewer male male_only mammal narrowed_eyes nude pastoral_dog paws penis sheepdog solo tongue tongue_out tsaiwolf|3983421968