I bought some Escar-Go! from Gardens Alive and just sprinkled it around my badly slug-eaten kale. Is this safe around my chickens? It says "don't have to be concerned about secondary poisoning of wildlife or pets", but I'm really not sure what that means. The active ingredient is iron oxide, but other ingredients aren't listed. Has anyone else used this product? Just because it's organic doesn't mean it's automatically safe (Rotenone has an LD of 50, for goodness sake), so I really need to know if my chickens need to be barred from this area.