Single or multiple jointed bit (1) with at least two mouthpieces (10), characterized by the fact that at least one mouthpiece (10) comprises at least one channel (100) which extends longitudinally with or without slope through this mouthpiece from one end to the other end, to enable the sending of a viscous and/or liquid substance (72) directly into the middle of the mouth of an animal (2) without changing the feeling in the animal's mouth or on its tongue (2).
