What to Do about Your Dog’s Bald Spots

Most dogs shed a little hair every day. But if your dog develops a bald spot on his back or side, the hairless patch points to a health problem.

Patchy bald spots where you can see through to the skin or a very thin coat may mean your dog has a hormonal imbalance. An excess of adrenal corticosteroid hormones, a deficiency of the thyroid hormone, or an imbalance in the sex hormones (such as estrogen) all can result alopecia, the medical term for hair loss. These hormonal abnormalities can only be diagnosed with blood tests.

If your dog has abnormal hair loss, talk with your veterinarian to see whether she may have a hormonal imbalance.

Some dogs, such as Whippets and Pharaoh Hounds, have very thin coats on their bellies and on the insides of their legs, which aren’t cause for concern — it’s just the way they are.

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Source:http://www.dummies.com/how-to/content/what-to-do-about-your-dogs-bald-spots.html