Scissor beak, aka: crossed beak, crooked beak, is a condition in which the top and bottom beaks do not align properly. It can be caused by genetics, an injury or the inability to maintain the beak’s length and shape by normal honing on rocks or other hard surfaces.
One of my first chicks, Esther, an Easter Egger, was born with with this common genetic deformity. It was so mild that I did not notice it for weeks. Scissor-beak varies in severity, but most chicks can eat and drink independently. Crossed beak need not be an automatic death sentence as believed by some. Most cross-beaked chicks adapt and thrive, leading long, happy lives. However, there are some chicks in which the defect is too severe for them to eat or drink independently and they can not survive without constant assistance.
Esther lived four years until without help eating or drinking. She was put to sleep after being diagnosed with cancer throughout her oviduct and other organs and she is dearly missed. It did take her more time and effort to eat than the other chickens and she was never as large as the other birds, but that is to be expected. Since crossed beaked chickens cannot pick up pieces of food using both halves of their beaks as utensils, they adapt by scooping food into the bottom half of their beaks. I find that it helps to put Esther’s feed in a deep dish, raised up to chest level so it has less distance to travel to reach her tongue than if it were on the ground. This small adaptation is sometimes all it takes to help crossed-beaked chickens eat.
Some chickens find it easier to eat a feed to which water has been added to make it the consistency of oatmeal. Grinding up feed in a coffee grinder and adding water to make a wet mash may help severely scissor-beaked chickens.
Chickens maintain the length and shape of their beaks by wiping them on rocks or other abrasive surfaces while foraging, but scissor beaked chickens have difficulty with this routine task. Due to the severity of Esther’s defect, she cannot hone her beak length independently and we periodically trim it for her using dog nail clippers. A Dremmel tool or file can accomplish the same objective, but the vibration from those methods may be more upsetting to the bird than a quick slip with nail clippers..
(Note: Chickens confined to a run should be provided with a paver, brick or cement block for beak honing.)