Aart does know her stuff.  I would not waste my money on that product if it is JUST DE.  And if it has a lot of other additives, why on earth spend money on it at all if you are betting on DE killing parasites on your birds.  IF I thought DE killed parasites, I'd be buying straight DE, not some product that was DE which is watered down with other ingredients.  
If you have issues with external parasites, use a product that is shown to be effective. Permethrin is one such product: comes in powder, spray can, or liquid which you can mix with water to make a whole lot of product for a little money. Permethrin can be used to treat your birds, your coop, and your garden.
	
		
			
		
		
	
				
			If you have issues with external parasites, use a product that is shown to be effective. Permethrin is one such product: comes in powder, spray can, or liquid which you can mix with water to make a whole lot of product for a little money. Permethrin can be used to treat your birds, your coop, and your garden.
	




