I built a backyard enclosure for an aviary, rescue tortoise. I know they eat a lot, and i'm finding new ways of getting cheap food, but i'd like to offset the cost even more and find some seed or weed he can graze on when it's not feeding time. Something that's cheap and i can throw seed down every day and just let them pop up all over the place, bonus point if they don't spread a ton so i don't get overtaken by weeds.