Please help. Something is making burrowing holes from under the ground into my chicken pen. What ever it is getting into the coop and eating the chicken feed because I am finding little pellet poops in the nesting box. I'm not sure what it is - I'm assuming it's a rat, mouse, mole or vole. We put a mouse trap out and mint sacks in the nesting boxes. Any other suggestions. I also read to use cedar chips in the outside pen to try and keep them away. I'm nervous. I clean the nesting boxes daily now and fill the holes. I layered DE everywhere! I'm afraid of sickness and mites and lice. What should I do?