Instruct: Classify the given review into positive or negative sentiment.
Query: It doesn't work well

I try to use it when I went on vacation. It only work for a few time. Then I have to ask a friend to come and feed the dog every day. The product grinds up my dog food so all the "powder" dog food got stuck at the bottom and plug up the machine and broke one of a piece of metal. I'll return it if I can.