Glass thorns even a dogs own coarse hair can all cause inflammation and bald spots if they lodge in your dogs skin. One of the most common causes of hormonal hair loss is hypothyroidism or a low thyroid.
Dog Losing Hair The Possible Causes And What To Do Next Carecom https://www.care.com/c/stories/6450/dog-losing-hair-the-possible-causes-and-what/en-gb/
Dog Has Small Skin Patches With Hair Loss http://www.organic-pet-digest.com/dog-has-small-skin-patches-with-hair-loss.html
Ringworm In Dogs And Cats The Skin Vet http://www.theskinvet.co.nz/ringworm-in-dogs-and-cats/