Most deworming products treat roundworms, hookworms and whipworms by paralyzing and killing the parasites; tapeworms are killed and broken up into smaller segments. Some intestinal worms, like hookworms and whipworms, are so small that you won't see any worms in your dog's stool at all.
What to expect after worming a dog?
After worming your pet, your dog may pass out dead worms and this is completely normal and nothing to worry about. Sometimes, they may show some slight movement, such as a flicking motion, but the worms will go on to die.
How long after deworming will my dog pass worms?
It can take as little as two hours for the worms to start dying off. However, in most cases, the process starts about 12 hours after administering the dewormer. You may continue to see worms in your pup's poop for about a week. If they had a serious infestation, you may see worms for up to two weeks.
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