Congenital alopecia is a genetically inherited defect of hair follicles resulting in lack of hair (baldness)
The following breeds are bald at birth or develop hair loss within 2-4 weeks of birth as a breed characteristic : American hairless terrier (autosomal recessive inheritance), Chinese crested dog, Inca hairless dog, Mexican hairless dog (autosomal dominant inheritance), Peruvian Inca Orchid. The Sphinx cat.
The following breeds have been reported to develop the disease of congenital hypotrichosis and they are born with symetrical hair loss, or develop it soon after birth: the American Cocker Spaniel, Basset Hound, Beagle, Belgian Shepherd, Bichon Frise, French Bulldog, Labrador Retriever, Lhasa Apso, Rottweiler, Toy and Miniature Poodles, Whippet, Yorkshire Terrier. There may be a sex-linked inheritance as males are usually affected.
The following breeds of cat have been reported to develop congenital hypotrichosis : the Birman (autosomal recessive inheritance - affected cats have no thymus on postmortem), Burmese (affected cats have no claws, tongue papillae or whiskers) , Devon Rex and Siamese (autosomal recessive inheritance).
Long term problems
Updated January 2016