My show dog Bandit had a few fleas, I used the Hartz flea shampoo. shortly afterward he began losing his hair. He has lost most of his hair and now needs to wear a coat 24/7/ His value as a show dog is not $0. He was gorgeous but now he looks like he is crossed with a hairless breed. I did not know this product could or would do this, My dog is 5 years old. The damage done to him was two years ago, he has hairy legs and a couple of patches but nothing else. Image is the before. I don’t have a afterward one yet.