Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Use caution!

I used this product on 16 week old kittens and it kills the fleas but it made the kittens sick. I don't think I'd recommend this product because there are no exact measurements on how much or how little to use. It's better to just use frontline or somethin that doesn't go all over your pet so that there is an accurate dose and so they can't lick/ingest it directly.