Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Doesn't work here

First, I don't like putting these products on my dogs. They're so chemical heavy, and I'm not even one of those people who rant about chemicals.But, the past few years have been horrible tick wise. Dogs were even picking them up just from our back yard. I went with frontline and discovered it did not work against ticks here in NE Illinois. Switched to K9 Advantix and found that worked much better for me.