Smooth sailing through all four seasons

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Smooth sailing through all four seasons


Clinical symptoms include mild respiratory signs: sick chickens exhibit "hissing" nasal movements, clear nasal discharge, lengthened eyelids, and foamy accumulations around the eye sockets. Later, they develop wheezing, coughing, labored breathing with the head extended and neck stretched out, accompanied by a distinctive "strange, rattling" cry. Meanwhile, the flock shows a severe drop in feed intake, along with ruffled feathers, retracted heads, and closed eyes. In some cases, individual birds pass yellow-green, watery stools. Unfortunately, many of the affected chickens also suffer from bronchial blockages that can lead to pulmonary embolism, ultimately resulting in asphyxiation and death. Notably, the majority of dead birds are medium- to large-sized individuals, often found lying on their backs with legs curled inward.