Nipped (6)
(Other definitions for bit that I've seen before include "gripped" , "Small quantity or piece of metal for a horse" , "Took effect - fragment" , "Snaffle - small piece" , "which is between one's teeth?" .)
(Other definitions for bitten that I've seen before include "Wounded (by a snake)" , "Attacked with teeth" , "Seized with the teeth" , "Torn by teeth" , "Stung" .)