The book is what got me started feeding more natural. I don't ever feed hay just pellets and our natural herbs and grasses. We have 4 acres that are organic. Have lots of goodies for rabbits growing like dandelions, herb plantain, oat grass, clover, wild carrot ect. I feed my meat growout one bucket a day to help reduce cost on there non gmo feed. It has been working great and for 3 seasons helps alot. The key here is I am not replacing pellets but am replacing the hay. Hay here is used for nestboxes only. Feeding this way cuts pellet consumption but without any nutritional loss. It has not caused me any weaning issues nor weight reduction in my Silver Foxes. I have great growth and health rabbits who truely enjoy there once a day greens feeding. But Remember we Don't spray here or are near anyone who sprays there place. So this makes a difference I am sure.