Jack Russell Terrier

MyDogDNA Breed Data: Jack Russell Terrier vs Parson Russell Terrier

Both Jack Russell Terriers and Parson Russell Terriers are small, white terriers with black and/or brown markings. These breeds were initially created for bolting fox from their dens during hunts. Both breeds have stayed quite true to their original character of being bold, active, highly driven dogs by being excellent family pets at the same time.

Breed-Defining Chondrodysplasia

Breed-defining chondrodysplasia, also called short-leggedness, is a favorable phenotype found in some breeds. The well-known features of this breed-defining trait are caused by the FGF4 retrogene insertion. Short-leggedness caused by the FGF4 insertion is a desirable trait, and it is caused by different mutation than the undesired dwarfism causing genetic disorder found in some breeds, such as the Norwegian Elkhound.

New test content for Labrador Retrievers and Jack Russell Terriers

Genetic tests for mutations causing Congenital Myasthenic Syndrome in Labrador Retrievers and Jack Russell Terriers are now available in the MyDogDNA 2016 test panel. The disorder is considered severe, typically with an early onset of symptoms. See a more detailed description below.