Hox B8 knockout mice were found to engage in this 
Hox B8 knockout mice were found to engage in this activity twice as often as their control littermates.In the mouse, ritualized steps in this activity were first discovered by Frances Stilwell and include"parallel," "circling," and "shimmy" movements. In lemurs and impala, this activity is accomplished with a"dental comb," and in birds, it is known as "preening." Human disorders of this activity, includingtrichotillomania (TRY-ko-TILL-oh-MAY-nee-ah), are often classified as part of the obsessive-compulsivespectrum. The "allo" form of this activity is a common social bonding device. For 10 points, name thisbehavior in which an animal gets parasites, dirt, and other unwanted things out of its or another's hair, fur,or skin.
Hox B8 knockout mice were found to engage in this activity twice as often as their control littermates.
grooming [or autogrooming; or allogrooming; or social grooming; prompt on preening before it is read; prompt on answers that reasonably describe grooming]