A)are part of the mating ritual
B)keep feathers clean
C)expose chickens to external parasites
D)are used to establish the pecking order

A)Hens need roosters to produce eggs.
B)Pullets are young male chickens.
C)Molting occurs in late summer.
D)Hens that share nesting boxes are slower to begin laying eggs.

A)protein
B)fat
C)carbohydrates
D)roughage