Yeah I'd remove those mats from the nest boxes, not sure how much the chickens will like them. Instead, for extra padding (as they'll scratch the nesting material around), what I like to do is put some bubble wrap in empty feed bags, then fold them to fit snugly in the nest box floor, and top with nesting material of choice. Some shavings or straw instead would be more comfy for them to sit on.Here are some pictures of the coop and nest boxes. Our coop was bought from one of our neighbors who used to own chickens, not commercially bought.