Another finding from the thesis was that they will consume what's available (surprise!), but an established pasture can regenerate quickly, whereas a forage crop grown from seed is a once-a-year resource, so rotation of foraged area is needed if space is limited. So the birds in the experiment were using the same piece of pasture repeatedly, between spells on the sown forage crops each of which were available for one period only. The quinoa was the most productive of those in terms of hen nutrition btw, especially the seed when it matured (profile also given in that post just cited).I think that my three have already mown through much of the available forage in their areas