In both the migratory systems described above, the herders follow a prescribed route (tsalam) to their respective grasslands. It is not uncommon to find more than one herd using a route. All herds then would have the right to use the route as well as the grazing rights to the grasslands of a specified night camp irrespective of whoever may own the particular grassland. This is called the "Lamjo Tsadrog" – roughly translated to "transit pasture". In the grasslands of upper Chokhor leading to the summer grasslands at Domjen, in Bumthang, there is an unwritten rule that no herd is allowed to pasture for more than three days in the lamjo tsadrog either way. It is noticed that because so many herds camp and pasture, the lamjo tsadrog are badly deteriorated and colonized by Rumex nepalensis.