By using a blender on a low setting, I grind shelled almonds, walnuts, cashews or brazil nuts. I mix the resulting meal with whole grain bread crumbs to make a nutritious meal for small birds.
I lightly toast a slice of whole grain bread and make the crumbs by grinding in the blender. This is the same bread that I eat. Each week, I buy a variety of kinds and brands.
You can grind firm tofu and mix that with whole wheat bread crumbs, too.
Birds like cooked brown rice (allowed to cool) with a little salt and olive oil. I alternate by every so often adding a bit of pancake syrup to the rice instead of the salt and oil.