FARM PENS is a term used to describe the enclosures used to house animals on a farm. The two crossword solutions for this term are COOPS and STIES, both of which are five letters long. COOPS refer to the enclosures used to house chickens, while STIES are the enclosures used to house pigs. Both of these structures provide shelter and protection for the animals, as well as a place for them to feed and rest.