AI overview
Patchy hair loss in dogs commonly stems from skin issues like flea allergy dermatitis, environmental allergies, or fungal ringworm, which often forms scaly circular patches. It may also indicate parasitic mange, acute hot spots, or underlying hormonal conditions such as hypothyroidism or Cushing's disease.
Because these conditions require different treatments, a vet examination is essential to identify the root cause. Contact your veterinarian immediately if your dog displays urgent symptoms like active bleeding, rapid spreading, severe pain, or extreme lethargy. Take a clear photo of the hair loss in the app to log a baseline before your appointment.
Informational only - not a veterinary diagnosis. For urgent signs, contact a vet immediately.