Cavalier King Charles Spaniel
The following diseases are reported to occur more frequently in the Cavalier King Charles Spaniel  (also called the English Toy Spaniel) 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. 

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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 affecting the stomach

• Haemorrhagic gastroenteritis (HGE)

Diseases involving the pancreas

Diseases affecting the small intestine

Diseases affecting the large intestine

Blood diseases

• Giant platelets and thrombocytopenia (autosomal recessive)

Diseases of the eyeball

• Microphthalmia
• Multiple ocular defects
• Persistent hyaloid system

Diseases of the eyelids

• Distichiasis
• Entropion

Diseases of the third eyelid (nictitating membrane)

Diseases of the cornea

• Corneal dystrophy
• Keratoconjunctivitis sicca (dry eye)

Diseases of the lens

• Cataract

Diseases of the lens

• Pseudopapilloedema 

Diseases of the retina

• Generalised progressive retinal atrophy
• Retinal dysplasia (Multifocal and Geographic)

Immune system diseases

• Immunodeficiency syndrome

Nervous system diseases

• Collapsing syndrome (Juvenile)
• Fly-catching, star gazing

Orthopaedic diseases

• Intervertebral disc disease
• Myopathy
• Shoulder luxation

Respiratory diseases

• Brachycephalic Upper Airway Syndrome
• Pneumonia (Pneumocystis carinii)

Skin diseases

• Ichthyosis
• Persistent scratching

Other

• Inguinal/scrotal hernia
• Pneumocystis carinii infection