Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Really Works!

My two guinea pigs had some white rice looking creatures crawling on them. I sprinkled little drops behind the ears and other parts of the body and within a week the creepy crawlers were gone.I gave them this treatment for once a week for 3weeks and they were gone.ALso works on pregnant guinea pigs because my female was pregnant and she plus the babies turned out fine.