Thanks everyone for the helpful comments.

I spoke to my vet yesterday and he too recommended grinding either bermuda or the sorghum stalks with the seeds.  I'll give it a shot and see how it works.  He also recommended a dash of salt, a dash of urea, and molasses/water.

I'm not really worried about prussic acid as my sorghum this year was not drought-stressed and I used very moderate fertilizer early-on.  Having said that, I was considering baling the material that's left in the field.  However, we had a good rain yesterday and I'm thinking of giving the plants another opportunity.  There's already green shoots 6 inches in length and we harvested just last Tueday.

This afternoon we gave a taste of sorghum meal to a small group of animals that were recently weaned.  As you guys have suggested, I'm going to start slowly and work my way up.