Rickets is well recognized in domestic animals, but published reports are not
always supported by microscopic findings, and diagnoses based on clinical signs and radiology are unreliable. Most cases in domestic
animals are caused by dietary deficiency of either vitamin D or phosphorus, but occasional inherited forms are reported in pigs,
sheep, cats, and dogs. There is variation between species in susceptibility to dietary vitamin D and phosphorus deficiency and in
the ability to manufacture vitamin D in their skin.