What Causes Hair Loss in Dogs & Cats? And When to Call a Vet

Normal Shedding vs Abnormal Hair Loss

Seasonal shedding is normal, but abnormal fur loss is patchy, irritating, and may signal health issues. Watch for redness, scabs, odor, or excessive licking to distinguish between the two.

Causes of Hair Loss in Dogs

• Allergies – Food, pollen, or chemicals may cause itching and self-trauma.
• Parasites – Fleas, ticks, or mites (e.g., mange) are common culprits.
• Fungal Infections – Ringworm causes circular bald patches.
• Hormonal Disorders – Hypothyroidism or Cushing's disease lead to symmetrical thinning.
• Stress & Anxiety – Over-licking or chewing due to mental distress.

Causes of Hair Loss in Cats

• Over-Grooming – Often stress-induced; leads to baldness on limbs and belly.
• Allergies – Fleas, food, or environmental triggers.
• Parasites & Infections – Fleas, mites, or ringworm.
• Hormonal Imbalances – Like hyperthyroidism in senior cats.
• Pain Response – Licking areas of pain, like joints or arthritis zones.

Diet and Environmental Triggers

Poor nutrition or harsh environments can weaken the coat. Ensure a balanced diet and avoid harsh shampoos or chemicals in the home.

When You Should Call the Vet

Seek vet attention if there are:

• Bald patches, scabs, or sores
• Persistent itching or licking
• Odor, visible parasites, or behavior changes
• Accompanying symptoms like vomiting, lethargy, or pain

Diagnosis and Veterinary Treatment

Vets may use skin scrapings, cultures, or blood tests to diagnose causes. Treatments range from antiparasitics and antifungals to behavioral therapy and dietary changes.

Preventing Hair Loss in Pets

• Regular grooming and parasite control
• Nutritious food and hydration
• Minimize stress and environmental triggers
• Routine veterinary check-ups

Conclusion: Trust Your Instincts

Hair loss in pets can point to various concerns—from harmless to serious. Early vet consultation ensures your furry friend remains happy, healthy, and comfortable. A shiny coat reflects overall well-being.