I normally give my cats Frontline, but I happened to come across Hartz flea drops in the store and it was a convenient buy. I administered the medicine onto both my cats, as I normally do, and didn’t think twice about it… Until I started finding patches of hair throughout my room. I panicked, searched for my cats and noticed that one of them had a bald spot right above his shoulder. I Googled “Hattz flea hair loss” and stumbled upon millions of negative reviews. I wish I knew all of this earlier, because bald spot, scab, and itches later: here’s my cat. I’m hoping neosporin or some sort of cat-wound-cream and a bandage will help him.