A senior prank went sideways yesterday in Niles, Illinois.

Cops received a call at 3:00 a.m. about a loose cow running through a local neighborhood. They called a local farm to help them corral the cow. Students bought the cow, a pig and chickens on Craigslist. The school is handling the cleanup of the animal waste. The students were cited for a curfew violation, disorderly conduct, animal feces accumulation and prohibited animal species.