We recently adopted a CDT, age = at least 50 years old. He eats dry grass: Timothy, Oat, Bermuda, as well as green Bermuda, and grazes in the yard for other weeds. He eats SO much that I have resorted to harvesting weeds at places where I know no chemical are used. I did purchase weed seed from 2 sources, planted a tray. Question: do any of you grow your own, and what is the process you use? I have had to supplement weeds with organic greens from the store, I'd rather keep it as natural as I can, thanks.