So we are using the Purina chick starter right now. When I was looking at the Layena, the third ingredient is soy. I checked the Zamzows layer feed and the second ingredient is soy. I know that chickens should not have a vegetarian diet and that they should not have soy. So what should be in chicken feed? Is there a link with a comprehensive list of feeds and ingredients? What do you use for your layers, and what do you recommend?