I am pulling my hair out here! Darn fleas are making my inside animals crazy - I bathe them all the time and use flea control but they are resistant and just awful. I put Sevin dust inside my vacuum (bagless) to kill any fleas I vacuum up and I vacuum all the time. I have hard floors, very few little rugs, and I wash my sheets and bedspread at least once a week. The problem is my YARD - they are out there, plotting. I have 6 inside-only cats and 2 dogs. The dogs bring the evil monsters inside. I need to get rid of them in my yard. I want to spray the begeebes out of it - but what can I spray that won't hurt my free-range chickens? I can coop them up for a few days while it dries for sure. But I am worried because they eat the grass, the weeds, the bugs... will it hurt them? I appreciate your advice!