Since my farm scale is small, I don't grow large fields of fodder items. Most are tucked into my own food producing garden areas. New areas opened for gardens often grow a fodder crop or two before switching to something else. And veggie plants growing my own food are often used for fodder too. Examples:
...sweet potatoes. We eat the tuber, livestock eats the rest of the plant.
...green beans. We eat the fresh beans, livestock gets the rest of the plant.
Bananas can be tucked in just about anywhere. I planted a few beside the house in a spot where we will be using to expand the bathroom and hot tub deck. So eventually the bananas will have to go. But for now they can produce fodder.
But I do some have areas pretty much dedicated to fodder. Those areas are often too shady, too difficult to easily access, or too dry for veggie gardens. This includes areas transitioning from sunny grassy areas too shady woods, the entire Secret Garden, the dry river bed, and some wooded areas not yet transitioned into pasture.
Currently my purposely planted fodder crops that are primarily grown for fodder include (we eat a little of some of them):
Pumpkins / winter squash / gourds
A nice thing about fodder crops is that they don't take up my time. It's pretty much plant and walk away. I'm not relying upon high productivity so I'm happy with whatever happens to grow. If the beds gets weedy or filled with grass, I don't feel the last bit guilty about not getting to it. When I harvest the greenery, I can take grass, weeds, and all to offer to the livestock.
The sweet potatoes I planted (above) were bordering a grassy area. With all the recent rains, the grass has gone crazy and invaded the sweets. No problem. I'll just harvest everything, cutting it right down to the ground for feeding to the rabbits. Then the sweet s will resort, letting me know where the tubers are located. I'll harvest them then turn over the soil, removing grass as I dig, and plant over again.