6 REASONS FOR HAIR LOSS IN DOGS

Dog hair is important because it protects the dog from extreme temperature, abrasions and physical damage. Hair loss from seasonal shedding is normal. Other causes of hair loss may require veterinarian diagnosis and treatment.
1. Allergies
Allergic reactions are a major cause of patchy hair loss. The dog may be allergic to airborne pollen, food ingredients or environmental exposure to allergens. Licking of paws, or small bumps over the body are typical symptoms of allergy. Once the irritant is identified, the dog exposure can often be restricted.
2. Folliculitis
Damage to hair follicles causes hair loss. Allergies, hormonal problems or bacterial infections cause belly hair loss, scaling or skin lesions. Usually antibiotics are prescribed to treat the infection.
3. Endocrine Problems
Endocrine glands control normal function and development. The glands produce hormones critical to dog health. Some endocrine diseases and problems cause serious hair loss. Examples are hypothyroidism and Cushing's disease.
4.Parasites
Sarcoptic mange is caused by mites.Many parasites such as fleas, ticks, mites and lice cause hair loss. Inflammation from the parasites causes infections and bald patches. Mange is an example of hair-loss disease transmitted by parasites.
5. Ringworm
Ringworm causes hair loss, skin scales and crusty sores. The hair loss is usually in a ring pattern and may itch. Various types of fungus cause ringworm, and it is usually spread by contact with an infected animal or items such as bedding or grooming gear shared with an infected animal.
6. Stress
When a dog has stress in its life such as illness, surgery or loss of an owner, the dog may blow its coat. Instead of normal shedding, the dog loses big clumps of hair. Handfuls may come out at a touch or in the dog bedding.