Originally Posted by LetAGrlShowU
I read up on diamtamacious earth as well as spoke to my vet who was against feeding it. It isnt chemical based. Its used by abbrasion. Kinda like eating glass... its a fine sharp powder that abbrasively kills worms. But in my mind... that would also impact the entire stomach, and other organs. I took mine off it when I bought him. How to Use Diatomaceous Earth as a Horse Wormer | eHow.com
uh I wouldn't say it's ANYTHING like eating glass..... it's a powder with MICHOSCOPIC sharp edges that cut the worms and bugs and cause their body fluid to leak out, kind of like drying them up. I never had any problem feeding it to horses. It feels like finely ground talcum powder. Very VERY soft to the touch, there is noting hard or sharp in it all all. I fed it to my TB with ulcers never had any problems.
HOWEVER the fact that it causes all the manure to be basically toxic is a big problem in my opinion. What are you going to do with 6 tons of manure a year that really can't be used for gardening? IF it were not for that I would be using it no problem. It would be a miracle because the worms can not get immune to it and it keeps the flies away too. I think it has it's uses and is good for worming especially in cases where the worms may be resistant to wormers, but the fact that it renders the manure useless is a huge concern that made me opt to go a different way.