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Since different medications only work on some parasites, they will not necessarily kill just any parasites that an animal may have.
They use different remedies, depending on what worms they find, For instance, some wormers will kill most of the common roundworms and hookworms that dogs or cats get; but they don't kill tapeworms at all. You have to use a special wormer that kills tapeworms.
Using diatomaceous earth will kill any kind of worm or parasite, because it cuts the parasite up; so there is NO way that any parasite can develop an immunity to it, as sometimes happens with worm medications that poison the worm.
Also, since DE is a natural mineral substance, it is actually beneficial to your pet, and there is no chance of harming or killing your pet, as a worm medicine can do.
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