My fighter character has taken the Willing Deformity and Deformity: Teeth feats from the Heroes of Horror handbook. It means that he now has a natural bite attack which deals 1d4 + STR damage.

My Strength is low, so is it possible to improve bite attack damage somehow, ideally staying in the fighter class? Are there any nice feats to take or maybe some kind of "jaw-weapon"?

Thank you!