Instruct: Classify Amazon reviews into positive or negative sentiment
Query: My vet uses this stuff

I had tried some other "natural" flea sprays that made my cats very ill and didn't work. I have 2 cats with a horrible flea outbreak. I found this stuff here on Amazon and ordered it based on the reviews. When it arrived I had already flea fogged the house, so I didn't feel it was needed to use this spray on them once I got it. The other day I took my cats to the vet b/c they had flea dermatitis, but I told the vet that I was pretty sure the fleas were gone. He pulled this stuff out of his cubbord and LIGHTLY misted them with it and rubbed it in a little- the fleas were jumping off my cats (and dying on the table) before my eyes!! I couldn't believe it!! I love that it worked without me having to lather them in it and it hasn't made them sick or lethargic at all. It also doesn't leave behind a nasty smell or coating on their fur. I LOVE IT!!