The Dalila effect:C57BL6 mice barber whiskers by plucking (2000)

Sarna, J. R., Dyck, R. H., Whishaw, I. Q.

Abstract

Barbering is a common abnormal behavior in laboratory mice. Barbers hold down their cage mates, who adopt a defensive posture, and remove hair by plucking with their incisors. Once removed, the hair is often chewed by the barber. Although plucking appeared 'painful', the recepients were passive in accepting barbering, and even pursued conspecifics for further grooming. .. When mice pairs are separated by a wire mesh, barbering continues.