Nicole Richie - Richie's Dirty Bus Experience

NICOLE RICHIE had an unsanitary experience while filming the third season of her hit reality show THE SIMPLE LIFE - when her pet dog HONEY CHILD relieved herself on a bus.

Richie travelled around the north-east region of America with her best pal PARIS HILTON on public GREYHOUND buses, and admits things got nasty when her pooch answered the call of nature.

She says, "I had to clean it myself. The bathroom had no mirror and smelled gross."

But the animal woes didn't end there: While they were filmed taking on various jobs, the beauties were far from impressed with their stint at a Baltimore zoo in Maryland.

She adds, "We had to feed dead rats and dead chicks to animals, which I didn't like to do. Overall it was fun."