QSomeone was talking about an anti-crowing collar and then it was mentioned in the November Your Chickens. How does this work? It said that the bird’s vocal chords were restricted – is this OK welfare?
AVictoria says: I did laugh when I read this in YC. The anatomy of the hen was obviously not known by the ‘inventor’ of this device. Unlike mammals, the voicebox of a chicken is not in its throat but at the base of the trachea just before it divides in to the two main bronchi (lung tubes). This voicebox is called the syrinx and it is more complicated in its features due to the fact that some birds sing, others can mimic speech or make various different sounds. I realise that a crowing cockerel cannot be accused of singing, but the trachea is open in the throat (have a look in the mouth of a hen sometime just by opening the beak) and there is no larynx here at all; all of the sounds come from the syrinx in the chest – thus, the anti-crowing collar won’t work.