Searchbreed
Symptom guide · Good fit for telehealth

Dog Hair Loss & Bald Patches

Thinning coat, bald spots, or patchy hair loss — often allergies or parasites, but endocrine disease is also possible.

Causes

8

Red flags

5

Prone breeds

9

Related

3

Triage

Good fit for telehealth

Itchy hair loss often fits allergy or skin-infection triage. Symmetrical, non-itchy hair loss or hair loss with weight, thirst, or behavior changes should be evaluated in person for endocrine disease.

When to call the vet now

Any of these signs means telehealth isn't enough — get in-person vet care today.

  • ×rapidly spreading bald patches
  • ×red, crusty, smelly, or painful skin
  • ×circular lesions that could be ringworm
  • ×hair loss plus increased thirst, weight gain, or lethargy
  • ×puppies or immunocompromised dogs
Causes

Common causes

  • allergies with scratching or licking
  • flea allergy dermatitis
  • mange mites
  • ringworm
  • bacterial or yeast skin infection
  • hypothyroidism
  • Cushing's disease
  • seasonal or breed-linked alopecia
Breeds

Breeds most prone to hair loss & bald patches

Not exhaustive — any dog can have this. These breeds are just more commonly affected.

Take the 2-minute itch triage quiz

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Recommended

What can help

Products and services matched to this symptom.

telehealth

Dutch

24/7 vet care and prescriptions delivered

  • Unlimited vet chats
  • Rx delivered to door
  • $11/month
  • Covers anxiety, allergies, derm
See Dutch
telehealth

Vetster

Book online vet appointments with licensed professionals

  • Licensed vets online
  • 24/7 appointment access
  • Video, chat, and voice
  • Prescription support where permitted
See Vetster
supplements

Zesty Paws Allergy & Immune

Seasonal allergy + immune support chews

  • NASC Quality Seal
  • Seasonal allergy support
  • Salmon oil for skin
  • Chewable, dogs love them
See Zesty Paws Allergy & Immune
Related

Related symptoms

Searchbreed is not a veterinary service and does not diagnose or prescribe. This is educational content to help you understand your dog's symptoms. For diagnosis and treatment, talk to a licensed vet.