From OpenStreetMap Wiki
|landuse = animal_keeping|
|An area of land that is used to keep animals|
|Used on these elements|
|Tools for this tag|
- animal_keeping=*<animal>, where <animal> means the name of the animal (english singular form). If more than one species is kept, provide a semi-colon-separated list, e.g. animal_keeping=sheep;cow .
| An open stable for horses.
Note for native speakers: In the UK the term open stable is rather unknown, because for some legal reasons those are non-existing there. Somehow similar is a field shelter - also sometimes called free barn. Contrary to an open stable the facilities within the area (like e.g. feeding stations, watering places, ...) have to be moveable.
| A paddock for horses. Also valid for the open-air area of a paddock box. For the closed area of a paddock box see building=stable.
Note: For pasture use landuse=meadow and preferable meadow=pasture.