The Collaborative International Dictionary of English v.0.48:

Havier \Hav"ier\ (h[=a]"y[~e]r), n. [Formerly haver, prob. fr.
   Half; cf. L. semimas emasculated, prop., half male.]
   A castrated deer.
   [Webster 1913 Suppl.]

         Haviers, or stags which have been gelded when young,
         have no horns.                           --Encyc. of
                                                  Sport.
   [Webster 1913 Suppl.]