We planted some sorghum into a two acre clover plot last year. We just happened to get some from a friend and our neighbor drilled it into the clover. We planted it way too early according to most people, about the middle of June.
When it grew, about 5 feet tall, we noticed a tremendous increase in daylight usage of the plot. I think it's a security issue. Never noticed any browsing of it though. We found beds in it and kicked up deer every time we went through it. This plot never got much daylight usage until late November. Once the heads ripened, the turkey tore it up. Deer usage continued into and through rifle season. 4 of our young members harvested doe in that field.
We plan to use it again this year but plant it later. IIRC, we planted two pounds of seed total. This ws on our property in SW PA. I can't say how it will do on wet soil though. Ours is on a well drained hillside.