Broody ducks and chickens both have the instinct to sit on and hatch eggs, but there are several differences in how they go about it and how successful they are.Broody chickens can be hit or miss depending on the breed. Some breeds, like Silkies, Cochins, and Orpingtons, are more likely to go broody, while others rarely do. Chickens are generally very committed once they decide to sit, but not all are great mothers. Some may abandon their chicks shortly after hatching or accidentally harm them.