Gave my cat the Hartz flea & tick drop & within 20 minutes she was seizing and foaming out the mouth uncontrollably! Definitely wish I would’ve done my research. This product is poison and should be banned!!!! I’ve gotten lucky & my cat made it through the night. but it’s a shame how something as simple as treating your cat for fleas can turn so deadly. Do not use hartz products on your fur babies.