Hi, welcome to BYC. I leave food in my coop all day because I have better things to do than feed my chickens several times a day. I also leave it in the coop at night because the coop is predator proof and that's the safest place for it. It's an 8x10 walk-in hen house. But chickens don't eat or drink in the dark so if it works better for you to remove the food and water at dusk and put it back in the morning, then by all means do that. Whatever works for you is fine, but remember that in nature, chickens are foragers and will pretty much eat all day, pecking and scratching for whatever they can find. That's why I keep their food available all day so they can help themselves. They also need granite grit available at all times for digestion, and your layers need oyster shell available to make good egg shells. Have fun and enjoy your flock!