Cat Hair Loss

Causes & Treatments of Hair Loss in Cats

There are different causes of hair loss in cats, some are quite normal, while others can indicate an illness that requires medical attention. Excessive hair loss in cats is also known as "Alopecia".  Alopecia is not a disease, but a symptom. Cats normally shed more hair during warm spring and early summer months.  

Most Common Causes of Cat Hair Loss

Flea Allergy Dermatitis

Cats may experience flea bite hypersensitivity, which is caused by an intensive reaction to the saliva of the flea. They will go to any lengths to reach the agitated skin, including biting off hair in the bothersome areas. Common symptoms include extreme itching, redness, scaling, and hair loss. In some cases, the infected area can become infected, which will require more intensive treatment.

Atopy

Some cats are also allergic to pollens and allergens like dust, mold, smoke. This causes redness and itching around the ears and feet. The cat will excessively lick and bite the skin which eventually leads to hair loss. Initial treatment includes reducing the exposure to the allergen, steroids, anti-histamines and special shampoos.

Atopic Dermatitis

Poor Nutrition

Hair loss due to poor nutrition often affects the whole cat, although it may affect areas that are easily worn and over the back and hips where hair follicles have shorter growth cycles and longer inactive periods.

It is important that your cat food contain nutrients that support healthy hair and skin, such as: vitamins, minerals, antioxidants, Omega 3 and Omega 6 fatty acids. 

Food Allergy Dermatitis

Another cause of cat hair loss is food allergy. Common food allergies are caused by grains (wheat, corn, soy), meats and fish (beef, lamb, pork, salmon), milk and yeast. In addition to hair loss, cats may also show other symptoms such as: reddened ears, excessive licking on the feet, itching and blistering and infection in certain areas. By feeding your cats with nutritious and balanced diet they will live a long and healthy life.

Hyperthyroidism

Hyperthyroidism is the most common hormonal disorder that cats experience, which will cause hair loss, weight loss, and skin lesions. This disorder is diagnosed with a blood thyroid level check, and it can be easily controlled with medication or radioactive iodine therapy.

Ringworm

A fungal infection. Scaly, crusty, or red circular patches 1⁄2 to 2 inches (12 to 50 mm) across. Patches show central hair loss with a red ring at the periphery. Sometimes just broken hairs around the face and ears. May become infected. Highly contagious, including to humans.

Psychogenic Dermatitis

Psychogenic dermatitis, also called feline psychogenic alopecia, occurs when a cat licks himself excessively, due to anxiety, stress, fear, or boredom. The excessive liking can cause cat hair loss, skin irritation, and open sores.

Diagnosis of cat hair loss

• Fungus culture - To look for ringworm.
• Specific blood tests - To check for hyperthyroidism.
• Specific blood tests - To check for Cushing's disease.
• Skin scrapings - To study under a microscope to look for mites.