I have 7 chickens who had survived a cat attack. Everything was going great but the other night my husband noticed our coop had 7-10 mice and rats in it. The next morning I came out and a small mouse sized bite was taken out of my Alfa chickens comb I asked my husband to set traps and he said our chickens would be fine this morning I came out and another chicken had a bite taken out of her comb almost like the rats are falling onto the chickens at night, can I put rat poison out? If the chickens eat the dead rats will it kill them ? Any advice?