Hi!!! My baby Beau is 7 months old. I found a flea today but it was not on him when I found it. I am worried that it was on him at one point. I just purchased K9 Advantix 2 for small breeds 4-10 pounds. Beau is over 6 pounds. Has anyone ever tried this product and if so, what are your opinions about it? My husband and I just want to make sure our boy will be okay with this treatment!!