Kettling (not to be confused with Rogering) is a police tactic for the management of large crowds during demonstrations or protests. It involves the formation of large cordons of police officers who then move to contain a crowd within a limited area. Protesters are left only one choice of exit, determined by the police, or are completely prevented from leaving. Detainees can be denied access to food, water and toilet facilities for a long period.[2] Sometimes arrests are made.
The name is rumoured to derive from an infamous occasion at the Grampian Hotel in Dalwhinnie, Scotland.
No more details are known.