I have been battling stick tight fleas for a couple of years. Cannot seem to totally eradicate them. My flock is free range and we lock them up at night in a wire coop. I read here on BYC to use Adams Flea and Tick Spray on the birds (cotton ball soaked and dabbed on affected heads and vents) so I did that and sprayed the coop/boxes and surrounding areas with liquid Sevin. The Adams was great, but it was an old bottle I found in the barn. It was Pyrethrin. The Adams I find in stores now is not. So I bought Adams Flea and Tick Yard spray which is 2.5% permethrin. Anyone have a suggestion as to how much I should dilute to apply using my cotton ball method? (Is there a dangerous level of permethrin to chickens?!) Or any other suggestions for eradicating the terrible fleas?!