I need your opinions on this. I have some DE that I have had for a long time. I was thinking about using it to dust and include in my chickens feed. I understand that there are food grade and not food grade. Neither says food grade on it. Bag 1 is Safer Brand DE Plus. It says ant and crawling bug insect killer and is in a yellow bag. Bag 2 is in a blue bag. It is Earth Safe Organic for organic gardens. It is make by Carl Pool Products. This bags says it can be added to horse, dog and cat feed. Would you say either is safe to use? What would be the consequences if a non food grade DE was used?