Bonniejean. You are being misled by the makers/salesmen of verm-x, they are trying to make a sale on a product that claims to kill worms naturally that doesnt, like DE. Dont you believe it for one second. Dont fall into that trap, it's a waste of money. Otherwise it'd be approved by the FDA/USDA as an official parasite killer which it isnt. If you had a belly full of worms would you want your doctor to give you a natural product to sprinkle on your food for once a month for each of the next 6 months to get rid of your worms? Nope....you'd want the strongest stuff given to you to get rid of them in the least amount of time. Meanwhile, your chickens would be slowly dieing of starvation...wazine is one of the mildest wormers on the market. It's almost impossible to overdose on Safeguard paste. Ivermectin is given to people as well as Safeguard (fenbendazole). Praziquantel Pamoate is used for hookworms, tapeworms in people and pets. See, alot of these wormers are more safe than you ever thought. It's easier to throw eggs out for one month rather than have sick wormy dieing hens on your hands. This is my last post on this subject.