1. Aberrant cilia: eyelashes growing abnormally, such as rubbing against the eyeball (see Distichiasis).

2. Allergies: same as in humans. Dogs can be allergic to things they come in contact with, eat or inhale.

3. Anasarca: a condition where neonatal puppies have an abnormal accumulation of fluids in their tissues.

4. Apocrine gland tumor: a cancer arising from glands which secrete fluids (such as mammary glands).

5. Basal cell tumor: a cancer arising from a type of skin cell.

6. Behavioral abnormalities: a whole range of abnormal behavior patterns, such as aggression, panic disorders, etc.

7. Cataract: as in humans, a change in structure of the lens of the eye leading to cloudiness and usually to blindness.

8. Cataract with microphthalmia: a condition where a dog has cataracts along with abnormally small eyes.

9. Cleft lip: a condition where the two halves of the upper lip do not join together. Cleft palate and cleft lip are often seen together.

10. Cleft palate: a condition where the roof of the mouth is not closed and the inside of the nose opens into the mouth.

11. Corneal dystrophy: an abnormality of the cornea usually characterized by shallow pits in the surface.

12. Cranioschisis: abnormal development of the skull characterized by openings between or in the bones.

13. Cutaneous asthenia: a condition where the skin lacks its normal strength, elasticity and sensation. Also called Ehlers-Danlos syndrome.

14. Cyclic neutropenia: a condition characterized by periodic lowering of neutrophils, a type of white blood cell.

15. Distichiasis: abnormally growing eyelashes.

16. Ectropion: an abnormal rolling out of the eyelids.

17. Ehlers-Danlos syndrome: a connective tissue disease characterized by loose, hyperextensible and very fragile skin that tears easily (see Cutaneous asthenia).

18. Elbow dysplasia: an abnormal development of the elbow joint.

19. Entropion: an abnormal rolling in of the eyelid.

20. Epidermoid cyst: a small growth consisting of tissues of the outer layer of the skin. (Sebaceous cyst: a small mass in the skin with a secretory lining and filled with a yellow waxy-like material.

21. Epilepsy: a disease characterized by convulsions (seizures) and/or disturbances of consciousness.

22. Factor VIII deficiency or hemophilia A: the most common severe inherited clotting disorder of humans and nonhuman animals. Inhereited as a sex-linked recessive trait (carried by females and manifested in males).

23. Factor X deficiency: a rare clotting disorder primarily of American cocker spaniels. An autosomal trait (affects both sexes).

24. Glaucoma: abnormally high pressure in the eye.

25. Hemolytic anemia: anemia caused by the destruction of the red blood cells by an autoimmune process. Particularly common in cocker spaniels and Old English sheepdogs, as well as several other breeds.

26. Hemophilia A: a blood clotting disorder due to deficiency of coagulation factor VIII (this is the most common type of hemophilia in dogs) (see Factor VIII deficiency or hemophilia A).

27. Hemophilia B: a blood clotting disorder due to lack of coagulation factor IX. (Factor IX deficiency or hemophilia B: same as hemophilia A, but more rare and involves a different clotting factor).

28. Hip dysplasia: a developmental malformation or subluxation of the hip joints.

29. Hydrocephalus: a condition where there is an abnormal accumulation of fluid in the ventricles of the brain.

30. Hypothyroidism: a common endocrine disease where the body produces an abnormally low amount of thyroid hormones. An autoimmune destruction of the thyroid gland which affects more than 50, dog breeds. (See Lymphocytic thyroiditis: an autoimmune disease causing inflammation and destruction of the thyroid gland, which becomes infiltrated with lymphocytes (white blood cells) and leads to hypothyroidism. This is the most comon endocrine disease of the dog and has an inherited predisposition . Thyroiditis: an autoimmune inflammatory disease of the thyroid gland).

31. Inguinal hernia: a break in the muscular layer of the body wall occurring at the inguinal canal (where the back leg meets the body).

32. Intervertebral disc disease: a disease where the discs between the vetebra are abnormal and prone to rupture and misplacement.

33. Keratitis sicca: a condition where one or both eyes do not produce a normal amount or type of tears.

34. Keratoconjunctivitis sicca: (Juvenile amaurotic idiocy: a syndrome characterized by early onset blindness and low mental capacity.

35. Lens luxation: a condition where the lens in the eye is displaced into an abnormal position.

36. Lip fold dermatitis: a skin infection caused by redundant skin folds around the mouth.

37. Lymphosarcoma: a cancerous condition involving the lymphatic system. One of the more common canine cancers.

38. Lysosomal storage diseases: a group of progressive multifocal neurologic disorders caused by specific enzyme deficiencies leading to death of nerve cells and accumulation of their respective enzyme substrates in cells. (Storage disease. Lipidosis: a form of lysosomal storage disease where lipids accumulate in nerves).

39. Melanoma: a rare cancer developing from the type of skin cell which produces pigment (melanin).

40. Osteochondritis dissecans: a specific form of inflammation of the cartilage of certain joints which causes arthritis. (Osteochondrosis: a group of developmental diseases resulting in abnormal formulation of joint cartilage. Commonly involves the shoulder, stifle, hock or elbow.

41. Osteochondrosis: a group of developmental diseases resulting in abnormal formulation of joint cartilage. Commonly involves the shoulder, stifle, hock or elbow. (Osteochondritis dissecans: a specific form of inflammation of the cartilage of certain joints which causes arthritis.

42. Otitis externa: an infection of the external structures of the ear.

43. Overshot jaw: a condition where the upper jaw is too long for the lower jaw.

44. Patella luxation: a condition where the knee caps slide in and out of place.

45. Patent ductus arteriosus: failure of the vessel remnant joining the aorta and pulmonary artery in fetal life to close properly at birth, thereby shunting blood away from the lungs.

46. Perianal gland tumor: (Perianal adenoma: a cancer arising from a cell of a gland found near the anus).

47. Persistent pupillary membrane: a developmental abnormality where the membrane forming the iris does not form properly.

48. Primary peripheral retinal dystrophy: a certain type of developmental disease affecting the retina.

49. Progressive retinal atrophy: a disease where the retina slowly deteriorates, producing night blindness.

50. Renal cortical hypoplasia: a condition where the cortex of the kidney(s) develops incompletely.

51. Retinal dysplasia: a condition where the retina is malformed.

52. Sebaceous gland tumor: a tumor arising from sebaceous glands of the skin.

53. Seborrhea: a skin disease with excess scaling of the skin and often an excess of sebum (oil-like substance) and odor.

54. Skin neoplasms: any number of tumors arising from cells of the skin.

55. Tail abnormalities: any number of problems associated with the tail.

56. Umbilical hernia: a break in the abdominal muscle wall at the point where the umbilical cord enters the body.

57. Undershot jaw: a condition where the lower jaw is too long for the upper jaw.

58. Ununited anconeal process: a developmental abnormality of one of the bones of the elbow joint causing pain. (Osteochondrosis: a group of developmental diseases resulting in abnormal formulation of joint cartilage. Commonly involves the shoulder, stifle, hock or elbow).

59. von Willebrand's disease: a type of bleeding disorder caused by defective blood platelet function. An autosomal trait affecting both sexes.