03/15/2026
Causes of Paralysis in Chickens: What Poultry Keepers Should KnowParalysis in chickens is a serious and often alarming condition for poultry keepers. It can appear suddenly or develop gradually, affecting a bird’s ability to stand, walk, or even hold its head upright. The image highlights several infectious causes of paralysis in chickens, many of which are common in backyard and small-scale flocks.Marek’s DiseaseMarek’s disease is one of the most common causes of paralysis in chickens. It often presents as unilateral leg or wing paralysis, where one leg stretches forward while the other remains back. Twisted necks and partial paralysis are also common. The disease is caused by a herpesvirus and primarily affects young birds. Vaccination is the most effective prevention method.Newcastle Disease (ND)Newcastle disease is a highly contagious viral illness that affects the respiratory, digestive, and nervous systems. Chickens may show signs such as tremors, paralysis, twisted necks, and difficulty breathing. Due to its severity and rapid spread, Newcastle disease is considered a major poultry health threat worldwide.Avian Encephalomyelitis (AE)Avian encephalomyelitis mainly affects young chicks, causing tremors, incoordination, and paralysis. Affected birds often sit on their hocks and have difficulty standing. While adult birds may carry the virus with mild symptoms, chicks are far more vulnerable.Botulism (“Limberneck”)Botulism causes flaccid paralysis, meaning the muscles become weak and limp. Affected chickens may be unable to lift their heads, a condition commonly called limberneck. This disease is caused by toxins produced by bacteria found in decaying organic matter, stagnant water, or spoiled feed.Fowl Cholera (Chronic Form)Chronic fowl cholera can lead to lameness and joint involvement, sometimes progressing to paralysis. While the acute form often causes sudden death, the chronic form results in long-term mobility issues, swollen joints, and reduced productivity.Prevention and ManagementPreventing paralysis in chickens depends on good flock management:Vaccinate against Marek’s disease and other preventable illnessesMaintain clean housing and fresh waterAvoid exposure to wild birds and contaminated feedIsolate sick birds immediatelyConsult a veterinarian for diagnosis and treatmentConclusionParalysis in chickens is usually a sign of an underlying infectious disease rather than a simple injury. Early recognition, proper biosecurity, and preventive care can significantly reduce losses. Understanding these causes empowers poultry keepers to protect their flocks and respond quickly when symptoms appear.