put herbs in with the chickens' pine shavings for bedding: Rosemary (pain relief, insecticide, respiratory health), Sage (antioxidant, anti-parasitic) and Mint (any kind - insecticide and rodent repellent).
Blue Bresse are good egg layers as well as delicious table birds. For a pest free nesting environment use chrysanthemum hay or cotton soaked with a chrysanthemum-derived solution to prevent insect infestations. Pine and cedar wood are also insecticidal so they may be useful in coop construction, but the same phenols that cause this are detrimental to chicken health in concentration and therefore shavings from these woods are to be avoided.
What type of bedding is best for the chicken coop? For the 12 coops on our farm in Missouri, we use pine shavings because they do not have a strong smell (like cedar) and do not create dust (like sawdust). Click to learn more laying season tips.