My guys get homemade mash every morning
I make a huge batch every month or two and freeze it. It's about 50% grains/legumes, 50% veggies/very little fruit.
Some of the things I use include: quinoa, brown rice, barley, buckwheat, cous-cous, oat groats, millet, lentils, split peas, bean mix, broccoli, cauliflower, peppers, cooked sweet potato, cooked white potato, celery, mustard greens, kale, beet greens, beets, apples, oranges, carrots, grapes, tomatoes, etc, etc. The grains/legumes are all cooked and mixed with some RPO. Veg/fruit go through the food processor so they're chopped tiny. Mix with the grains, add "extra" stuff (raisins, coconut, ground flax seeds, etc), portion out and freeze.