(Portland, OR)  --  A man is facing nearly two years behind bars after sexually assaulting a horse.  A judge yesterday sentenced Kenneth Duyck to 20 months in prison after he was convicted on charges of sexual assault of an animal and unlawful use of a motor vehicle.  Police say the stable owner called police after a veterinarian examined the horse and took samples of fluids, which matched Duyck's DNA.  Police say they found Duyck sleeping in a stolen car in a Walmart parking lot and arrested him.