Arabians, pure and part-bred
Friesians, pure and part-bred
Warmbloods, pure and part-bred
Fell Ponies, Dale Ponies and Gypsy horses, pure and part-bred
Quarter horses and related breeds, pure and part-bred
Saddlebred and related breeds, pure and part-bred
Akhal Teke, pure and part-bred
Connemara, pure and part-bred
Coat colour tests
Naked foal syndrome (NFS) is a fatal inherited disorder that has been found in pure and part-bred Akhal Teke horses. Foals with NFS are born without hair, and may have other physical abnormalities too. All NFS-affected horses recorded so far have died before three years of age. The cause of death is not known.
NFS is an autosomal recessive disorder. Autosomal disorders are equally likely to affect male or female horses, while "recessive" means that a horse needs to inherit the NFS mutation from both its sire and its dam to be affected. Horses that have inherited the NFS mutation from just one parent are called NFS carriers, and do not have physical signs of this disorder.
Our information and terminology is based on the sequences and content in Bauer et al. (2017): https://doi.org/10.1534/g3.117.039511
Foals or horses with NFS are striking. This light colour on this one is because it is cremello.