I just recently had a rodent bloom at my place. I use TomKat brand of rodent poison. my birds are up off the ground and well contained, so I just strategically place the blocks banquet style anywhere they will find them. It is blue two inch by one inch rectangle cubes with a hole up the middle and they can NOT get enough of the stuff. When I first started using it there was a mouse explosion a few years ago so I got a bucket of TomKat and hid cubes around because we had loose dogs at the time. Well, two days after putting in the blocks it looked like it had hailed mice! I am not kidding you, they were all over the lawn like a mouse bomb had gone off. One old dog must have pigged out on dead mice because about ten days later she died of the rat poison. She was 14 but spry and in pefect health. So... TomKat works like a miracle, and secondary poisoning from dead rodents is a definite risk. Just sharing what a terrible mistake I made, one in not realizing how bad the problem was, and two, for not keeping the dogs up until I had a chance to clean up the little bodies.