I am deciding whether to get ducks or chickens. How do they compare based on general laying age and how long they lay eggs for? Do ducks need more food than chickens? How can can ducks (Khaki Campbells) fly vs chickens? How much can you sell ducklings and chickens for at a market? How much can you sell chicken eggs and duck eggs for and what is the demand? Thanks for your help I'm really stuck here.