Well, we have had a humid summer in southern CA. Last summer, I did see some of those big roaches around the neighborhood and a few in the yard. But, this year, my husband went out to close the chickens up a little later than usual, and in one of the cracks of dirt, he said there were so many it looked like the ground was moving. They are not near the coop, but I can't help but wonder if having the chickens keeps them in our yard. I use DE, in the coop and around the house and yard and I know I can't eliminate them completely. (my house backs up against a rain drainage ditch) BUT, I don't want them that crazy...plus I am freaking out about them getting in the house. I read about setting boric acid traps, but I have not only the chickens, but a small child and a dog. At least one of my hens will eat them, but they are active at night, when the chickens are in and not active, so I don't see that being a great pest control.... Any tips?