Oct 04, 2018 - 08:52 AM
In my opinion, adding a food grade DE to animal feed of any type will probably not result in any control of whatever you are trying to control. DE is basically ground up diatoms that either absorb moisture or have tiny spines that pierce through insects are dry them out causing them to die. Outdoors or in dry walls, attics, etc, it can have some insect control properties as the spines are dry, hard and can puncture an insect. Once it gets wet, the tiny spines become soft and don't have the same properties as when they are dry. Using it in feed and ingesting by an animal will result in soft spongy spines. So unless there is some other reason that you want to feed it to animals, the cost and effort is not worth the trouble.
I am not a big believer in many uses of DE. It's way overrated and is considered "organic" and "safe". If you breath it, it can cause lung irritation and breathing issues. If you are applying it dry, be sure to wear a dust mask and do not breath it under any circumstances.