Yeah, it was this Hartz one: https://www.amazon.com/Hartz-UltraGuard-Topical-Prevention-Kittens/product-reviews/B0016H8Z44 https://www.amazon.com/Hartz-UltraGua

Yeah, it was this Hartz one: https://www.amazon.com/Hartz-UltraGuard-Topical-Prevention-Kittens/product-reviews/B0016H8Z44 https://www.amazon.com/Hartz-UltraGuard-Topical-Prevention-K... Look at how many 1 star ratings there are. We sorted by 1 stars and then by newest reviews. If you go back for a few months it's just an endless amount of scary negative reviews but it wasn't so bad years ago.