Dill can grow to around three feet so it’s best to plant it towards the back of your veggie or herb garden to give your other herbs some breathing and sun space. Good for your Hens. Thanks to Dill your chickens can breathe easy, this super herb assists with the respiratory health of your flock. It’s also a very powerful antioxidant so mix some freshly cut dill into your chicken feed to keep your hens at the height of health. Good for your Garden.