Ok, I just bought De that says earth safe organics. Is this food grade?? Can i give it to my chicks? What kind of yogurt can I give my chicks? Can I give my chicks all of the hard boiled eggs??? Last but not least, how can I feather sex?? Is this as accurate as venting?? How come hatcheries dont do this??? Can I do this on bantams??? What age should I feather sex?? Any info would be great!!! Thanks