We have acquired a dog (in a store or in an animal nursery center) and after three days he has become ill and they have told us that he has a very grave hereditary illness. Can we demand money back/an exchange?

Yes. We must direct ourselves to the establishment where we received the accreditation documentation of the sale and demand money back, as animals should be sold without diagnosable hereditary illnesses. Search in the database: “pet”; “sale”, “zoological group” or “breeders”. Also, the Código Civil (Civil Code) regulates this situation in a generic way:

Real Decreto de 24 de julio de 1.889 código civil In case of disagreement, we can go to the municipal or regional office for consumer information, where they will inform us of the most adequate procedure to demand money back.