The Collaborative International Dictionary of English v.0.48:

Fowl \Fowl\, v. i. [imp. & p. p. Fowled; p. pr. & vb. n.
   Fowling.]
   To catch or kill wild fowl, for game or food, as by shooting,
   or by decoys, nets, etc.
   [1913 Webster]

         Such persons as may lawfully hunt, fish, or fowl.
                                                  --Blackstone.
   [1913 Webster]

   Fowling piece, a light gun with smooth bore, adapted for
      the use of small shot in killing birds or small
      quadrupeds.
      [1913 Webster]

WordNet (r) 3.0 (2006):

fowling piece
    n 1: a light shotgun used for fowling