Rule 34 Dev - black_hooves black_tail_tuft brown_background cheek_tuft facial_tuft feral fur grey_body grey_ears grey_fur grey_tail hooves leg_tuft male simple_background solo tail tail_tuft tuft terribleanimal tony_(terribleanimal) asinus donkey equid equine mammal 2017 digital_media_(artwork) full-length_portrait hi_res portrait|18364797535