You may want to look into the work of
Mark Shepard at New Forest Farm. He's grazing cows and pigs through chestnut, oak, hazelnut,
apple, and berry
polyculture. They eat the fallen fruits. So any of those plants would be an option as a rotationally grazed silvopasture assemblage, providing great supplement to the pasture throughout the season. The other benefit of a silvopasture system like that is that it extends the seasonality of the pasture, which means less need for off season fodder. Others to consider are bamboo (
cattle love the tender tops, so rather than throw them away when you harvest for poles,
feed them instead...not technically pollarded, more coppiced for poles), Tilia species (pollard very well, but also a prime human edible, so perhaps you might plant it for your own personal use, with an added fodder benefit), siberian
pea shrub (caragana arborescens, seeds only, especially good for poultry), and beech (fagus sp., again also a good human edible, lemony new growth in spring, not entirely positive it's good for fodder, but I know the nuts definitely have been fed to livestock historically).