Cat & Dog Health • Skin & Coat

Normal shedding or abnormal hair loss?

Loose hair on furniture can be normal. Bald patches, broken hairs, inflamed skin, intense itching, crusts, or a sudden change in coat quality are different problems.

Veterinarian reviewedUpdated Aug 20, 2026
The key takeaway

Normal shedding changes coat density; alopecia creates true areas of missing or damaged hair and often has an underlying cause.

What affects normal shedding?

Breed, coat type, season, indoor lighting, age, reproductive status, grooming, and nutrition influence how much hair a pet sheds. Indoor pets may shed more continuously than animals exposed to stronger seasonal cycles.

Signs that are not normal shedding

  • Distinct bald patches
  • Redness, odor, scabs, or pustules
  • Intense scratching or licking
  • Broken hairs rather than loose full hairs
  • Skin darkening or thickening
  • Systemic signs such as weight change or lethargy

Possible causes

Parasites, allergies, bacterial or fungal disease, hormonal disorders, pain, excessive grooming, and nutritional problems can alter the coat. Diagnosis is based on the pattern plus skin testing and, when appropriate, bloodwork.

What helps a healthy coat?

Feed a complete and balanced diet appropriate for life stage, use regular parasite prevention, groom according to coat type, and investigate persistent skin changes. Adding random supplements is not a substitute for diagnosing a dermatologic problem.