I've gotten the amdro at home depot. It comes in sprinkle/pour containers, and bait stations that you could pin down in the yard. You could DIY a bait station out of a tupperware container to make it tamper proof for your chickens. It's been a while, but I had read that the main ingredient in amdro is not poisonous to ducks so that made it a better idea for me at the time.Those just kill the ones that touch/eat it.. the amdro is carried back to the nest, and isn't active until they chew it up to feed their babies and queen.. and then it begins to cover the tunnels where the rest of the lot dies! Then, the distress call is made and the rest come back to help!!![]()