Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Frontline Plus for Cats

I was really disappointed by this purchase. I have used two of the doses, and they appear to be working, so that's why I didn't return it. However, when it came in the mail, the box was all squished and the inside packaging was coming apart. The medicine stinks like skunk & old beer (but disappeared after about a day), and the years of Frontline usage tells me this isn't normal. I suspect the package I bought is old.