He is personally responsible for many innovations in animal housing and management, ranging from designing better pig pens to reducing highway accidents involving wildlife. (humanecanada.ca)
At Prestage Farms in Oklahoma, which sells hogs to Seaboard Corp, workers place pieces of rope into pig pens for hogs to bite. (scientificamerican.com)
You can use s hamster or guinea pig pen and put trash bags on the floor cover with fleace or bedding (dwarfhamsterblog.com)