I read that when they are pullets they are most likely to wonder...once they start laying, they tend to stay closer to home.

Mine don't really get the chance to get out the yard. There coop is about 8x10 and then I have a 20x30 area that I fenced in for them. I also put poultry wire over the top of it because we have a lot of hawks in the the area.

Hope you find your girl!