I have a two word
answer:
lawn mower.
I may just have a 6.5 hp push mower, but I can push it over all sorts of things that I want chopped up: sorghum canes, sweet potato vines, chicory that has gone to seed, etc. You get a little practice and see what size rutabaga it takes to choke your mower blade, and you remember to run over stuff smaller than that. Either that, or you tilt the lawn mower and make it come down on piles of hard to digest stuff, that seems to make the machine chew better.
The stuff that comes out of my lawn mower bag is too valuable to
compost. Unless I am running over poisonous weeds, the animals get first crack at the baggings, and after they have picked and scratched and pooped through it, THEN it can go to the composting pile.