The Dog is a light brown creature with black eyes, a black nose and a black facial pattern. It has one LEGO stud in the middle of its back and when ridden, the Characters legs hang on either side of it. It has a cute, puppy-like bark.
This creature appears to be the Dog Alsatian / German Shepherd (Police Dog) with Black Eyes and Forehead Pattern. This piece can be found in several City and Police-themed LEGO sets, including Swamp Police Station.