Anyone grow sorghum for strip grazing?

We had sorghum come up as volunteers all over the farm and I saw the cattle gobble it down when they changed paddocks. It got me wondering - it grows so much better than corn (rich dark green where corn is pale) and seems to have the same amount of mass, tho on shorter plants. It also seemed to compete well with the grass and weeds in the paddock (and lawn). Does anyone here sow sorghum in pastures/paddocks for additional fodder? What's the feed value and do I need to have any toxicity concerns? I've read that sorghum can be toxic at some stages of growth.

The highlands do fine with the grazing I have but for fattening a steer without using grain, would a high-sugar plant like sorghum or sweet corn work better than just grass? Our last butcher beef, a young uncut bull, had almost no fat on him and I miss having some fat when I cook it.