You linked to the exact same web address as me...goodhors said:I thought there were problems with anything eating dried Johnson Grass!
Here is one of the places that show Johnson Grass to be toxic:
http://www.vet.purdue.edu/toxic/plant43.htm
Perhaps it is in the timing of the feeding or cutting for hay? Notes say that Johnson
Grass was used for hay on that site.
Toxic for both Cyanide and Nitrates. So not a grass or hay I would want to use.
When johnsongrass is dry, the level of cyanide is extremely low, so properly cured hay is safe for consumption. If the grass is used for silage or green chop, the levels of cyanide may still be quite high and potentially lethal. If the grass has accumulated toxic levels of nitrates, the hay, silage and chop will continue to be toxic