Instruct: Classify Amazon reviews into positive or negative sentiment
Query: DON'T BUY THIS! MY DOG ALMOST DIED FROM IT!

Please do not buy this! I gave the recommended dosage to my 20lb dog for 2 days and she became violently ill! The vet said it was a reaction from this product. She became so sick very quickly and would have died if we did not rush her to the vet. I wrote the company to let them know about this and all they said to me is "you cannot return this product if it was is used!" Good thing they care about pets and about selling products that may be toxic! Please DO NOT use this product or buy from these horrible people if you care about your pets lives!