Any insecticide can become ineffective/resistant.
Took my successfully protected(with frontline plus) dog to Tennessee a few years ago, I treated him a week before we went down but he got absolutely infested with fleas. Had to go the Capstar/Comfortis route (and A LOT of vacuuming the house/furniture) for a few months to get them all gone from dogs and house. Went back to frontline plus and no problems since.
For me, they dont seem to be infested since i moved to SC. But, I believe some are allergic to flea saliva, so if I count every bite, may as well be infested. I was flipping out when I realized they needed new treatment right away, and the Australian Company I use to save big $ takes too long to wait for shipmemt, so I went to
Petsmart to look for Capstar/Comfortis. They had the one that is used every day, Capstar. While there I asked the canine trainer where it was located, and she talked me into K9 Advantix 11. Said she only treats her dogs when she sees a flea, and had not treated them for a year. Hard to believe, but I used Frontline only every other month, which worked great for fleas, not so much for ticks. The Advantix works, but only 30 days exactly, and dogs still get bitten because it can take flea two hours to die. So, I may try Comfortis.
I am wondering, even though it is clearly not approved for use on chickens, if might try the k9 Advantix 11 if I see any bugs. I am aware that DE helps prevent, but highly suspect is does not work for total flea elimination, and should fleas or other creepy crawlies take up residence on my chicks, i have heard on this list one cannot rely on DE to treat.
I am also wondering, do chickens only get the fleas that stick? ( Cant remember name, but they freak me out extra.) Or can chickens slso get the kind of fleas that inhabit cats snd dogs? I would not treat chicks as prevention. But if I had a problem, I would use unapproved chemicals to get rid of them all, and fast. We do not eat our chickens. If I was forced to use chemicals, I would have to lay off eggs till it was safe again.
Flock Master, it seems I have eliminated all other reading materials to ask all these crazy questions?!
Lisa