Hi all! I am new to chickens this year and I think that my girls are getting to the age where they will need to start eating layer food. So, I have read different things, some recommend feeding at a certain age (20 weeks or so) even if not laying yet, and some recommend switching to layer when they start laying. What do you recommend? My girls are 20 - 23 weeks old and I am almost at the bottom of my chick feed bag and wondering if I should switch to layer if they haven't started laying yet? Second part: Any recommendations on food brands and scratch? My feed store sells Nutrena Nature Wise, Nutrena Country Feeds, and Nature Smart Organic. Any of you use any of these, and if so/not what do you recommend out of them or other brands? All advice is greatly appreciated! Thank you so much!