Instruct: Classify a given review as either positive or negative.
Query: Working very good so far

Well its been less then a month since I used this on my two dogs but so far it seems to be working well. My dogs are outside almost all day everyday and before I used this product they were covered in fleas but since I have use it I have checked them twice and could not find a flea on them. Its been awhile since I checked them so I will do that today. It is now the 21st of the month and they are due for their next treatment on the 24th, so if they are good today that is fantastic. I hope this stuff continues to work.