herding
 集中畜群
 Herd, v. i. [imp. & p. p. Herded; p. pr. & vb. n. Herding.]
 1. To unite or associate in a herd; to feed or run together, or in company; as, sheep herd on many hills.
 2. To associate; to ally one's self with, or place one's self among, a group or company.
 I'll herd among his friends, and seem
 One of the number.   --Addison.
 3. To act as a herdsman or a shepherd. [Scot.]
 herding
      adj : (of birds and animals) tending to move or live together in
            groups or colonies of the same kind; "ants are social
            insects"; "the herding instinct in sheep or cattle";
            "swarming behavior in bees" [syn: herding(a), swarming(a),
             social]