posted 7 years ago
Hi Beth, welcome to permies. A lot of literature on diatomaceous earth and alternatives to chemical de-wormers suggest a rate of 2% by weight of the animals feed. Let's say a grazier has their cows on grass and they don't feed their cows a commercial feed, they mix DE in with mineral supplements such as kelp and/or sea salt. Some even offer DE free choice for the cows. It seems that results are achieved in one to two weeks. Some folks keep DE mixed in their feed or minerals all the time and don't wait for symptoms to arise to use DE. It is noted that DE will absorb water in the rumen, so make sure the cows have access to plenty of water. Hope this helps!
"Study books and observe nature; if they do not agree, throw away the books." ~ William A. Albrecht