Mine are on sentinel and frontline and neither are working very well. If you go outside anywhere they come in with you. Alabama is horendous with fleas but my labs that stay outside don't have any! Of course there's no grass in their pen either (they turned it to dust). I haven't found anything natural or not that kills the fleas
__________________ Mommy of Cody,Gracie,Bella,2labs,1cat, 2 skinkids
one Angel Baby Boy  8/8/09 I carried you under my heart for 20 weeks and will carry you in my heart forever |