Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Unsafe

I gave my 8 year old Maltese angel eyes, he became very sick vomiting, unable to eat lost a lot of weight, was in intensive care for 2 days. Came home still sick unable to eat, diagnosed with ileus from antibiotics. Exploratory surgery, ruptured bowel peritonitis, in critical condition. Completely healthy dog until I gave him angel eyes. What a mistake.