I have a few questions? Can you mix ducks and chicks to equal the 15 minimum? Or do I have to buy 15 ducklings and 15 chicks? If you have ordered from cackle, what breed are the extras and roos or pullets? What chicken/duck breeds does cackle do the best and worst with? This is not really to do with cackle, but any hatcheries that have a special with chicks and a few ducklings(10 chicks and 5 ducks)? Or should I just go to the feed store? The guy is a poultry expert and will special order breeds. I can also see them before I buy them and have no limits.