2012 4_toes all_fours anthro anus ass backsack balls big_butt black_nose black_pawpads blue_background blue_border blue_eyes border_collie canine claws collie digitigrade fur hi_res libra looking_at_viewer looking_back male male_only mammal multicolored_fur pawpads paws penis perineum presenting presenting_hindquarters raised_tail rear_view simple_background solo toes tongue tongue_out truegrave9 two_tone_fur two_tone_tail whiskers