corralling

from The Collaborative International Dictionary of English v.0.48

Corral \Cor*ral"\, v. t. [imp. & p. p. {Corraled} (-r?ld" or
   -r?ld"); p. pr. & vb. n. {Corralling}.]
   To surround and inclose; to coop up; to put into an inclosed
   space; -- primarily used with reference to securing horses
   and cattle in an inclosure of wagons while traversing the
   plains, but in the Southwestern United States now
   colloquially applied to the capturing, securing, or penning
   of anything. --Bartlett.
   [1913 Webster]