The Collaborative International Dictionary of English v.0.48:
Herd \Herd\, v. i. [imp. & p. p. Herded; p. pr. & vb. n.
Herding.] [See 2d Herd.]
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.]