All dogs are at risk of inheriting diseases, regardless of whether they are purebred or crossbred dogs. A substantial amount of research has been carried out to analyse these diseases by investigating important factors, such as what causes them, which breeds may be affected and how the disease is inherited. Funding into this type of research has enabled the development of tests and screening schemes, and resources which allow breeders to help reduce the number of affected dogs and eventually eradicate these conditions.