Long Hair Gene - LHG



The long hair gene is a gene that causes a longer length coat in numerous breeds. It does not pose any health threats, however in some breeds it is considered a breed fault and many breeders are advised to test for the gene if the trait is considered undesirable in offspring.

Severity - 0

Long Hair Gene has a no degree of severity, as it is poses no health threats. Testing for this trait is based on preference, not for health concerns.


Breeders in particular can benefit from better management of mating through knowing whether their dogs are carriers for the long hair gene. As the condition is considered to be a breed fault, and thus to prevent undesirable pups, it is advisable that testing is carried out. Similarly, if trying to specifically breed a long haired dog, it is helpful to know the genetic status and possible success rates for particular matings.

Genetic Testing

Animal Network provides a DNA test that determines the genetic predisposition to the Long Hair Gene.

The Long Hair Gene is an autosomal recessive disease. A recessive phenotype (trait or disease) will only be expressed when two copies of the recessive gene variant are present. A direct gene test can detect whether a dog is clear, carrier or is affected by the disease.

A dog with two copies of the recessive gene variant is affected, they will express the phenotype and will pass a copy of the gene variant onto their offspring 100% of the time. A dog with one copy of the recessive gene variant is a carrier, they do not express the phenotype themselves, however they are will pass the gene variant onto their offspring 50% of the time. A dog that has does not have any copies of the recessive gene variant is clear, and will never produce affected offspring.

For an explanation of possible genetic status of offspring please refer to our fact sheep on Breeding strategies. ORDER A TEST

Breeds Affected

Alaskan Malamute
Chihuahua Long
Chihuahua Smooth
Dachshund Miniature (Long-Haired)
German Shepherd Dog
White Shepherd
Labrador Retriever
Welsh Corgi Pembroke

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