I seen this page and decided to share my story to spread awareness. I noticed my cats neck the other day was burned , all she had on was a Hertz flea collar . Her neck is a mess and now starting cream and daily cleaning to help it heal . I don’t recommend anyone use this product on any cat . I’d hate anyone’s poor animal to go threw this. I have contacted the company hopefully I will be contacted but I highly doubt it sadly they should take responsibility for their actions .