Chesapeake Bay Retriever

Dilute (D Locus/Blue)

Several gene variants are known to produce dilute coloration in dogs. Colors are lightened (diluted) to paler shades as a result of the variants' effects on pigmentation.

MC1R including Mask, Grizzle, and Red/Cream (E Locus)

The melanocortin 1 receptor (MC1R) gene controls production of the pigments eumelanin (black) and phaeomelanin (red/yellow). Six known variants of this gene are responsible for producing markings and coat colors including melanistic mask, grizzle/domino, black, and shades of red/yellow.

Chondrodystrophy (CDDY and IVDD) and Chondrodysplasia (CDPA)

Chondrodysplasia is a short-legged phenotype characteristic of many dog breeds. Chondrodystrophy, a separate mutation, also includes a short-legged phenotype as well as premature disc degeneration and increased susceptibility to disc herniation.

Hyperuricosuria (HUU)

Hyperuricosuria is an inherited disorder characterized by elevated levels of uric acid in the urine that can lead to the formation of bladder/kidney stones.

Exercise-Induced Collapse (EIC)

Exercise-induced collapse is a genetic neuromuscular disorder characterized by muscle weakness, lack of coordination, and life-threatening collapse after intense exercise in otherwise apparently healthy dogs.

Degenerative Myelopathy (DM)

Degenerative myelopathy (DM) is an inherited neurologic disorder of dogs characterized by gradual muscle wasting and loss of coordination typically beginning in the hind limbs. Testing is most appropriate for those breeds in which the clinical disease has been associated with the SOD1 allele.