Rule 34 Dev - 2019 4_toes 5_fingers all_fours anal anal_knotting anal_sex anatomically_correct anatomically_correct_penis animal_genitalia animal_penis anthro anthro_on_feral balls canid canine canine_penis canis collie cum cum_in_ass cum_inside cum_while_penetrated domestic_dog feral german_shepherd heart herding_dog kneeling knot knotting kola_(artist) male mammal pastoral_dog penetration penis sex sheepdog simple_background toes yaoi zoophilia|3584366312