Segregation in sheep?!?!?

[Farmercharliesblog]

Lately I have noticed something horrible in sheep at the sheep farm I work at. The sheep are segregating each other. The white sheep are on the top of the ladder, while black sheep are second on the ladder, gray sheep are third on the ladder, while multi color sheep are on the bottom. The dogs give the top of the ladder freedom while it gets worse the lower you go. I can’t believe this is happening.