In spite of your name, I assume you are talking about chickens.
Are the chickens purebreeds or crosses? If pure, it would help to know what breeds. There are different ways to make a white hen. If the parents are pure breeds, the odds are the all chicks will either be black or all will be white depending on what genes are making the hen white. However, there is a combinations that could give you all fawn colors. There may be some other combinations possible, but I'd usually all black or all white. Seems like there are usually some exceptions or qualifications to chicken genetics.
If they are not pure but are instead crosses, there are a whole lot of options as to what they might be. Some of the colors and patterns will really surprise you. It just depends on what the crosses are.