Screening Scheme Description

DNA test - SD2
Skeletal Dysplasia 2

Retriever (Labrador)

Clinical signs

Apart from the shortened stature, SD2 affected dogs do not show any further clinical signs. This contrasts with pituitary dwarfism, which can cause malformed genitals or neuronal diseases.

Details about the disease

SD2, also known as dwarfism, is a genetic condition that causes long bones to stop growing before being fully developed. This particular type of dwarfism results in shortened front limbs and a raising dorsal line, but does not alter the torso length and depth as with other forms of dwarfism (pituitary dwarfism).

How it is inherited

The disease is described as an autosomal recessive condition. This means that a dog must inherit two copies of an abnormal gene (one from its mother and one from its father) before its health is affected. A dog that inherits only one copy of the abnormal gene (from its mother or its father) will have no signs of the disease, but will be a carrier and may pass the gene on to any offspring.

Which laboratories test for this condition?

A list of laboratories and DNA tests can be found at the following link

How to responsibly breed from your DNA tested dog

If, once your dog is DNA tested, you would like to find out what their DNA test results mean, or how to select the right mate to avoid producing affected puppies, then please read our breeding advice and information on the following link

How to find out if a potential mate has been DNA tested

The Kennel Club’s “Health Test Results Finder” allows you to find the results of DNA tests carried out as part of official Kennel Club DNA testing schemes for any dog on the Kennel Club’s breed register. To access this free health tool, please follow this link


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