I used to have Light Brahma chickens. Those big old hens would actually go out hunting for mice. of course when the caught one, the chase and fight was on over who would get to eat it. I have not seen any evidence of mice in my coop for many years so assume that the current chickens are also mice eaters.Send them to my barn then! I have the house of mouse up the hill and cannot figure a safe way to rid it of them. Poults and hens roost on the up high places so no traps and i dont want to decon them for fear somethin up there eats them and gets poisoned. ;/
I used to use DCon in the hay barn and would find dead mice all over the place. I never saw any evidence that the animals eating the dead mice were harmed at all. Of course some idiot got that product banned.