The Collaborative International Dictionary of English v.0.48:

brach \brach\, brache \brache\(br[a^]k or br[a^]ch), n. [OE.
   brache a kind of scenting hound or setting dog, OF. brache,
   F. braque, fr. OHG. braccho, G. bracke; related to Sw. brack
   a dog that hunts by scent; possibly akin to E. fragrant, fr.
   L. fragrare to smell.]
   A bitch of the hound kind. See also bratchet. --Shak. [Also
   spelled bratch when pronounced (br[a^]ch).]
   [1913 Webster + Century Dict. 1906]

         A sow pig by chance sucked a brach, and when she was
         grown would miraculously hunt all manner of deer.
                                                  --Burton
                                                  (Anatomy of
                                                  Melancholy).
   [Century Dict. 1906]