There are types of poisons in which there is no "relay toxicity" ie if a cat or chicken eats the dead body, they will not get poisoned. They are vitamin D based. I tried RatX which is supposed to work only on rats and mice - it causes them to lose their desire to drink so they just slowly dehydrate and die. It won't harm pets or chickens or kids if they eat it. I can't say it worked all that great though. They were getting into my quail enclosure and eating the quail eggs. Maybe a few fell for it. But the ones in my kitchen, coming from under the oven, are still pooping on the counter (eeeeew).