Medium Sized beak bits suitable for most chickens.
 
Anti-Peck beak bits are used to help as a short term solution to feather pecking in chickens.
 
You will need a pair of circlip pliers to fit these (available from the electrical secion of DIY stores).  Please fit them very carefully as if incorrectly fitted they will be painful.
 
It is essential that the chickens have a very deep bowl of food and water when fitted with an anti-peck bit as they have to 'scoop' it up from underneath rather than peck it from above.
 
Leave on for no more than a couple of months to try and break the feather pecking habit.
 
Wrap the hen in a towel or blanket.  
Gently hold her beak open.
Fit the beak bit inside the nostrils - it is crucial it is not pinching the nostrils closed but goes under the flap of skin.