Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This did not work at all..

I bought this because it was recommended to me . Our dog died and the area where he died became infested with fleas a couple weeks later. I don't know if one has anything to do with the other. But anyway,I bought 2 bottles of this and sprayed the yard focusing on the problem area. I did this 2 days in a row because the first day saw no changes. The fleas in that area are so bad that if you put anything down there you can hear the fleas start jumping. Yesterday was the second day . This morning when I went to check,they were just as bad. No difference whatsoever. By the way,I bought at Walmart for $19.95 a bottle.