5 year old buck +
That would work best, but to get it to keep growing, you've got to cut it above a certain point, and I can't recall if that's 4" or 12", and you're gonna have impressive biomass, possibly more than you can manage.Couple of questions ...
My local Feed Mill dealer suggested growing sudan grass then mowing when it gets to 2'-3'. Repeat that process as many times as you can during the growing season. Thoughts?
Why no cereal grains?
The no cereals point was about alternating between high carbon and low carbon plants. If you get too much duff built up, it doesn't break down, and your ability to build soil will slow down. You don't have to alternate, you could also do a permanent perennial/annual mix. That's a whole other ball of wax I ain't completely mastered yet.