Short tail (Bob tail)is a body trait which can be tested with a DNA test for dogs.. Dogs differ greatly in their morphological characteristics including various tail phenotypes. Congenitally short- tailed dogs are present in many breeds. The short-tail phenotype includes either a complete lack of vertebrae or a short tail with variable length. A mutation that causes short tail in some breeds can also affect some other properties of the dog. Pembroke Welsh Corgi with homozygous mutation for short tail having severe anatomical defects. 

In some breeds decrease in the litter size have also be observed. In some breeds characterized by naturally occurring short-tail, the mutation has not been found. That is why we do not recommend this DNA test for identification of natural short tail in following breeds: Boston terrier, English bulldog, King Charles spaniel, Miniature Schnauzer, Parson Russell Terrier and Rottweiler. 

Inheritance: autosomal dominant - read more

Mutation: T-Box gene

Genetic test: The method used for genetic testing is extremely accurate and allows complete differentiation between affected animals, carriers and healthy dogs. DNA testing can be done at any age.

DNA test sample: EDTA whole blood (1.0 ml) or buccal swabs. Detailed information about sampling can be found here.