Keep Rodents out by planting mint around the coop. Spearmint, peppermint, wintergreen, even lemon balm all help deter mice. Sprinkle fresh or dried mint in the coop and nesting boxes year round. (I am surrounding my house with mint.no more mice for me)
Cool idea: DIY: Garden Stakes from paint stir sticks. Choose your colors to all coordinate or use bright primary colors. These would look great if you wrote down the scientific name next to trees and bushes. A great idea for landscape or vegetable garden.