Understanding Hair Loss in Pets

At Krichel Animal Hospital, we understand that hair loss (alopecia) in dogs and cats can be concerning for pet owners. While shedding is normal, excessive or patchy hair loss may indicate an underlying health issue that requires attention. Causes range from parasites, allergies, and infections to hormonal imbalances and stress-related overgrooming.

Identifying the root cause is essential for effective treatment and long-term skin and coat health. Early signs of alopecia include:

  • Excessive shedding or noticeable bald patches
  • Persistent scratching, biting, or licking affected areas
  • Red, inflamed, or scaly skin
  • Sores, bumps, or unusual skin texture

Common Causes of Hair Loss in Pets

1. Parasitic Infestations

Fleas, ticks, and mites are among the most common causes of hair loss in pets. These parasites irritate the skin, leading to persistent scratching and potential secondary infections.
Symptoms of Parasite-Related Hair Loss:

  • Intense scratching and chewing at the skin
  • Bald patches, redness, or inflammation
  • Presence of flea dirt, ticks, or scabs

Preventing parasites is key to maintaining your pet’s coat and skin health.

Read about year-round parasite prevention

At Krichel Animal Hospital, we offer comprehensive parasite prevention plans to keep your pet protected. Schedule a visit

2. Allergies & Skin Sensitivities

Allergies are a major cause of hair loss in dogs and cats and may be triggered by:

  • Flea allergies – Some pets are hypersensitive to flea bites, leading to intense itching and hair loss.
  • Food allergies – Ingredients like chicken, beef, or dairy can trigger skin reactions.
  • Environmental allergies – Pollen, dust, and mold may cause chronic skin irritation.

Learn more about flea allergy-related hair loss in cats
Signs of Allergy-Related Hair Loss:

  • Frequent licking or chewing paws
  • Red or inflamed skin
  • Ear infections or recurrent skin infections

Long-term exposure to allergens can lead to chronic dermatitis and persistent skin issues.

Learn more about dog allergies and treatments

Explore allergy management tips

3. Hormonal Imbalances

Conditions like hypothyroidism (low thyroid function) and Cushing’s disease (excess cortisol production) can cause significant hair loss and skin changes.
Symptoms of Hormone-Related Hair Loss:

  • Dry, brittle fur with thinning patches
  • Weight gain and lethargy (hypothyroidism)
  • Increased thirst and a pot-bellied appearance (Cushing’s disease)

Veterinary testing, including bloodwork and hormone panels, is necessary for an accurate diagnosis.

4. Genetic and Breed-Specific Hair Loss

Some pets experience breed-related alopecia, which is not linked to medical conditions. Examples include:

  • Doberman Pinschers – Prone to color dilution alopecia
  • Dachshunds and Greyhounds – Susceptible to pattern baldness
  • Siamese and Burmese Cats – May develop stress-related hair loss

Although genetic alopecia is typically harmless, veterinary consultation can help rule out underlying medical issues.

5. Stress and Overgrooming

Pets experiencing anxiety, boredom, or changes in their environment may excessively groom themselves, leading to hair loss. Psychogenic alopecia, common in cats, is often stress-induced.
Signs of Stress-Related Hair Loss:

  • Excessive licking, particularly on the belly or legs
  • Bald patches without visible skin irritation
  • Behavioral changes such as hiding or aggression

Providing a calm, enriched environment and engaging your pet in regular activity can help manage anxiety-induced overgrooming.

Read about pet grooming and skin health

Diagnosing Hair Loss at Krichel Animal Hospital

When you bring your pet in for hair loss evaluation, our diagnostic approach includes:

  • Physical examination – Assessing skin condition and overall health
  • Skin scrapings & cytology – Checking for parasites, infections, or yeast overgrowth
  • Blood tests & hormone panels – Evaluating thyroid function and endocrine health
  • Allergy testing – Identifying environmental or food-related triggers

Early diagnosis prevents complications and ensures the best treatment plan for your pet.

Treatment Options for Pet Hair Loss

1. Medications & Topical Treatments

  • Antibiotics & antifungals for bacterial or yeast infections
  • Steroids & antihistamines to control inflammation and itching
  • Flea and tick preventatives to eliminate parasites

2. Nutritional Support & Supplements

A well-balanced diet rich in omega-3 and omega-6 fatty acids promotes skin and coat health. Your veterinarian may recommend:

  • Fish oil supplements for anti-inflammatory benefits
  • Hypoallergenic diets for pets with food allergies
  • Probiotics & skin-supporting vitamins

Use this pet calorie calculator to ensure proper nutrition

3. Regular Grooming & Skin Care

Maintaining a consistent grooming routine helps reduce hair loss caused by:

  • Matted fur leading to skin irritation
  • Excess shedding from seasonal changes
  • Dirt & allergens that worsen skin sensitivities

At Krichel Animal Hospital, we’re committed to helping your pet maintain healthy skin and a full, beautiful coat. Whether it’s allergies, parasites, or hormonal imbalances, our expert veterinary team is here to diagnose, treat, and prevent future hair loss.

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