A muzzle is used, in order to limit the freedom of action of a dog or a coworker with its muzzle (statements). This can serve with a combat dog (unreasonable coworker) to reduce the danger that results these humans or animals, sees muzzle obligation.
Also with the attendance of the veterinary surgeon with the dog (coworker) the muzzle can be used, if the danger exists that the animal becomes aggressive by the stress of the unusual situation.
In the transferred sense the term is also used devaluing for measures, which would usually limit their action or according to opinion of the concerning liberty of opinion. Also a film of Erich Neureuther and a book of Heinrich Spoerl carry the title the muzzle.