I don't know that I've ever seen a dead deer in the sorghum-sudan fields here. If they were eating it when it was producing prussic acid, they would most likely not make it out of the fields. When cattle get into it, they drop in the field.

Most years I don't lose any cattle on it, but it has happened. As long as it is dry and has been dry, I've never had any problems. And as long as it is wet and has been wet, I've never had any problems. It doesn't seem to stress it enough to cause problems. Two scenarios cause me the most problems. The first is when it goes from wet to dry to wet to dry, without a significant period of time passing between each cycle. The next is when it is dry and has been dry, and we get one of those little pop-up showers that rains about a tenth of an inch. The day goes from hot to hot and humid, and the cattle have to be removed immediately or they will start dropping like flies.

Johnsongrass does the same thing.