Because animal fats break down way more slowly than plant matter, they can create airless pockets in your compost pile, leading to a slimy, putrid-smelling mess and stalling decomposition.
Cabbage is one of those vegetables that can fall flat if it doesn't get the love that it deserves. Sure, you can boil or steam it, but why not pop it in the oven and roast the stuff? An assertive roast will yield a charred exterior and tender insides - no slimy, limp cabbage leaves in sight.