Yes Congenital humpback is a congenital defect, because inbred hamsters may have some physical defects, and they are prone to some diseases from an early age, such as congenital humpback, which is difficult to cure, so there are. Hamster, taxonomically belonging to a subfamily of Carnivora, has 7 genera 18 species, among which there are 3 genera and 8 species in China, commonly known as hamster.