The Shetland Sheepdog
The following diseases are reported to occur more frequently in Shetland Sheepdogs than in the general dog population. In some cases the disease either has, or is believed to have, a genetic, hereditary cause but many of the diseases listed here do not have a proven genetic basis. 

If you do not find the disease that you are looking for in this list the disorder has probably not been reported to occur more frequently in this breed than in the dog population as a whole. Try to find it through the search button.

Alimentary tract diseases
This section includes diseases that involve the mouth, oesophagus (gullet), stomach, small intestine (duodenum and ileum), large intestine (colon and rectum), liver and pancreas.

Diseases involving the mouth

Diseases affecting the gullet (oesophagus)

Diseases involving the pancreas

• Pancreatitis

Diseases affecting the small intestine

• Hemorrhagic gastroenteritis

Diseases affecting the large intestine

Blood diseases

• Hemophilia B (factor IX deficiency, Christmas disease)
• Von Willebrand's disease (type III)

Heart valve disorders

Abnormal development of major blood vessels to the heart

• Patent ductus arteriosus

Heart muscle disease

Diseases of the eyeball

• Collie eye anomaly
• Micropalpebral fissure
• Multiple ocular defects
• Persistent pupillary membranes
• Uveodermatological syndrome

Diseases of the eyelids

• Distichiasis
• Entropion

Diseases of the third eyelid (nictitating membrane)

Diseases of the cornea

• Corneal dystrophy (epithelial)
• Corneal dystrophy (sub-epithelial geographic) (congenital)
• Nodular episclerokeratitis

Diseases of the lens

• Cataract

Diseases of the optic nerve

• Coloboma
• Micropapilla
• Optic nerve hypoplasia

Diseases of the retina

• Progressive retinal atrophy (central)
• Progressive retinal atrophy (generalised)

Other

• Lower than average Schirmer Tear Test (15.8 +/- 1.8

Nervous system diseases

• Deafness (congenital)

Orthopedic diseases

• Calcaneoquartal subluxation (due plantar tarsal ligament rupture)
• Carpal ligament weakening
• Elbow luxation (congenital)
• Hip dysplasia
• Polyarthritis
• Shoulder luxation (congenital)
• Superficial digital flexor tendon luxation
• Tibial deformity (distal growth-plate injury)

Reproductive Disorders

• Azoospermia with spermatogenic arrest
• Cryptorchidism
• Testicular neoplasia

Skin diseases

• Bacterial folliculitis (superficial)
• Color-dilution alopecia (blue)
• Discoid lupus erythematosus
• Familial dermatomyositis
• Histiocytosis (skin)
• Malassezia dermatitis
• Sertoli cell tumours
• Skin tumours
• Systemic lupus erythematosus
• Ulcerative dermatosis
• Uveodermatological syndrome

Other

• Reactions to Milbemycin (potentially fatal)
• Reactions to Ivermectin (potentially fatal)