I am having a serious rat problem. I believe it's because the coops I have are all three on dirt floors. I'm planning on getting some hardware cloth and putting it on the floors and also up the sides where the wire is big enough for a rat to get through. Will this be enough to keep them out? I've been using poison---very safely, of course, but it's almost like they figured out that it kills them and won't touch it now. I am just so sick of these disgusting things!