Rickets is a disease affecting young growing animals characterized by defective calcification of bones leading to deformity of the skeleton. It is caused by factors disturbing the metabolism of calcium, phosphorus, and vitamin D. Clinical signs include bowed legs, enlarged joints, stiffness, and susceptibility to bone fractures. Diagnosis can be confirmed with radiological examination showing a lack of bone density and abnormal bone structure. Treatment involves dietary supplementation with calcium, vitamin D, and phosphorus as well as exposure to sunlight.