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Minerals and vitamins are essential nutrients in poultry diets that play a crucial role in growth, egg production, reproduction, and overall health. Deficiencies in these nutrients can lead to serious diseases in chicks and layers, affecting productivity and sometimes causing mortality. Five common mineral and vitamin deficiency diseases in poultry are rickets, perosis, goitre, vitamin A deficiency, and vitamin D deficiency, each with distinct symptoms. Rickets is primarily caused by a deficiency of calcium, phosphorus, or vitamin D in growing chicks. It affects the proper mineralization of bones, leading to weak, soft, and deformed skeletal structures. Chicks suffering from rickets often show bowed legs, enlarged joints, thickened beaks, and stunted growth. In severe cases, the sternum may be bent or twisted, and chicks may have difficulty standing or walking. Poor eggshell quality in later stages can ____ ____ _______ _____ ____ ________ ____ ___ ______ ________ ________ ____.
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