(I'm a newbie! Don't even have my chickens yet.) Do I have to have an incubator? Or can I let the hens hatch the eggs and raise the chicks? (and a really stupid question....how do I know when to gather the eggs and when to leave them for the hen to hatch? is that a decision I make or the hen?) What is the advantage of using the bator? If I use a bator, do I have to separate the chicks from the flock until they are large enough not to get picked on? Thank you!!!