Was site looking at stories and wanted to share. So here goes. Hope I did this right. I used to works at a vets office. We had cats that would come in all the time sick after their owners had used hartz products on them. We would put together these kitten/puppy cat/dog packets for new clients all the time; and one thing in there was a flyer against hartz meds. To my knowledge it isn’t FDA approved and they use ingredients that are toxic and were taken off shelves like 20 years ago; that arent supposed to be used. Who knows. All I know is the product kills and makes animals very ill.