Try some fly paper. It's pretty cheap.
I'd say spraying a liquid Permethrin would do no good, maybe a Permithrin powder if the fly lands in it, but yea probably not worth the money or effort. Your problem is you leave the poo for a week in the building. Try to clean some up every morning and add a little shavings. Chickens require a little maintenance if you are lucky.
I'd say spraying a liquid Permethrin would do no good, maybe a Permithrin powder if the fly lands in it, but yea probably not worth the money or effort. Your problem is you leave the poo for a week in the building. Try to clean some up every morning and add a little shavings. Chickens require a little maintenance if you are lucky.