Got a white leghorn pullet from a chicken owner who needed to downsize her flock. She started laying for me at about 18-19 weeks, and now at 23-24 weeks, she lays 5-7 eggs a week. She is smaller than my other LF birds though, and flies very well...we clipped her wing, but she still figured out how to fly up on the fence where there is a slight dip, and get into my garden to eat my tomatoes! She doesn't do much harm though, so I'll let her continue.
