I think you will find your idea's may not work out in practice though.
Your handfull's of this and that, would mean multiple containers of different foods, and loads of time taken up tying to get the right amounts of everything through the mincer.
I have pre soaked dog food, mixed with peas, broccoli, apple, elder berry, black berries and wholewheat pasta in a huge container.
My home made food is mainly rabbit based, i also buy and add chicken wings, and anything else i may have about the place, hare, venny, fish.
On the mincing pan i have a pile of the (non meat) mix. A rabbit goes