Instruct: Classify Amazon reviews into positive or negative sentiment
Query: had to take my dog to the vet twice for reaction to advantix!!

I will never use this product again. After using this product my dog started panting and could not be still. He also had diarrhea so bad that I had to take him to the vet twice. The vet had to put him on 3 different meds 3 times a day for a couple weeks. I will only use natural products in the future. This is my baby!