Hefted Sheep
This is an English term for sheep that learn to live in a particular location who do not stray from their “land”. For us this is another piece of the jigsaw of how animals operate in the wild and know where “home” is.
DEFRA ( Britain’s government Agency for Rural Affairs) asked ADAS to do this report for them.
You also find this piece interesting too:
http://www.sovereignty.org.uk/features/footnmouth/hefted1.html