I currenty have my 5 week old Black Austrolorp chicks on Manna Pro Organic feed- when is a good time to switch to grower feed? I can't seem to find a Manna Pro Organic grower feed does anyone have an ideas on another brand of organic grower feed? I want to keep my chicks away from GMO and stay organic. Is it ok to keep the chicks on chick starter until they start laying or would mixing layer and chick starter work better?