I've always used, "Ark Naturals" Neem Shampoo.... it was ordered from:
http://www.arknaturals.com/products/...&Product_ID=10
they also have a spray which I plan to try this year...I just ordered this new one from:
http://www.highcascadeemus.com/xcart...hp?productid=3
the ark one you leave it on for five minutes then rinse ...I would brush him out on a white towel to see if anything would come off & it sure would, I'd find about 4-5 dead fleas....I'm trying the 4 in 1 shampoo because it says it repels the fleas off where I believe the neem only kills when bathed. I just tried the Frontline because I thought it would be easier, but I'm going back to what I used before.....