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

I applied to my healthy cat and immediately, he showed a bad reaction to this med. I tried to wipe some of it off, but it was to late. He developed LARGE scabs at the area. It seems like it burned his skin!! It was horrible! He spends all day trying to lick his wounds! Will be needing to take him to the vet!