Considering that nearly every animal that walks up to my corn piles or rice bran piles craps or pisses in it, I don't see the irrigation being a hazard to the animals.The article mainly warns against using the water to grow food for human consumption, and in a way that results in human contact. My idea would only grow deer food, in this case the clover idea shared by others.
Next thing they are going to tell me is not to drink out of my garden hose.