Humberside police are searching for two men who attempted to steal a 14-month-old Rottweiler bitch puppy.
The incident took place on the public footpath parallel to Canal Lane, Pocklington at 11am, last Friday.
There was a short scuffle which resulted in one suspect being bitten by the Rottweiler on the wrist. The victim also sustained bruising to the ribs and swelling to his forehead.
The men ran off towards Canal Lane and A1079 junction in Pocklington.
One suspect is described as white, 6ft tall, broad build with dark coloured hair and short beard. The other suspect is also described as white, 6ft tall and gingery coloured stubble.