− | A faecolith is a hard discreet mass of inssipated faeces. It can cause obstruction in the small or large colon resulting in colic and reduced faecal output. The faecolith forms around an initial nidus of indigestible plant material or a small foreign body, such as thread, string or rubber. | + | A faecolith is a hard discreet mass of insipissated faeces. It can cause obstruction in the small or large colon resulting in colic and reduced faecal output. The faecolith forms around an initial nidus of indigestible plant material or a small foreign body, such as thread, string or rubber. |