wolf guarding the sheep

black sheep

A nonconformist; an unusual or unconventional person, who may be rejected or disdained by others for this reason.

count sheep

To attempt to go to sleep by thinking of something boring, traditionally by counting imaginary sheep.

cry wolf

To raise a false alarm; to constantly warn others about an imagined threat, thereby failing to get assistance when a real threat appears.

have the wolf by the ear

To be in a dangerous situation from which one cannot disengage, but in which one cannot safely remain.

keep the wolf from the door

To ward off poverty or hunger.

white sheep

a conformist; an ordinary or conventional person

wolf down

To consume (food) quickly or greedily, without regard for table manners.

wolf in one's stomach

A ravenous hunger; a large appetite.