It would be equally reasonable to say that sheep are born carnivorous, and everywhere nibble grass.

I'm the black sheep.

The mountain sheep are sweeter, But the valley sheep are fatter. We therefore deemed it meeter To carry off the latter. - Thomas Love Peacock,

A leap year Is never a good sheep year.

She walks--the lady of my delight-- A sheperdess of sheep. Her flocks are thoughts. She keeps them white; She guards them from the steep. She feeds them on the fragrant height, And folds them in for sleep.

A black sheep is a biting beast.