Originally Posted by 
Old Farang
				
			 
			I guess the toxicity to horses depended on just how much they ate, although we never had any in the horse paddock. Also, the dairy cows would not have been exposed to it, but the dry stock, weaners and heifers certainly were with out a problem. The seeds are very hard if I recall, so may have passed straight through a horse thereby contributing to the spread of the crap.  
It definitely was not toxic to sheep, as that is how is acquired the name of "Salvation Jane", I think during a drought in South Australia, where sheep survived on it.