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I got my puppy about 3 weeks ago from the animal shelter. The shelter had wormed her a few days prior and I took her to the vet the same day I got her. She tested negative for intestinal worms and hasn't had any problems. She eats well and has normal stools.

Today I knew something was wrong. She wasn't eating her food and was crying to go outside, so I let her out. She had long strands of white spaghetti looking things coming out of her!! I'm assuming this is worms. They were stuck hanging out of her butt until she scooted it across the grass.

Why would she test negative for worms if she had them? :confused: And what can I do for her? She seems to be feeling better now because as soon as she came in she immediately ate all of her food and started playing with her toys. I have to take her back to the vet on the 16th for her next round of shots. Do I need to take her back before then to have this treated?
 

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I got my puppy about 3 weeks ago from the animal shelter. The shelter had wormed her a few days prior and I took her to the vet the same day I got her. She tested negative for intestinal worms and hasn't had any problems. She eats well and has normal stools.

Today I knew something was wrong. She wasn't eating her food and was crying to go outside, so I let her out. She had long strands of white spaghetti looking things coming out of her!! I'm assuming this is worms. They were stuck hanging out of her butt until she scooted it across the grass.

Why would she test negative for worms if she had them? :confused: And what can I do for her? She seems to be feeling better now because as soon as she came in she immediately ate all of her food and started playing with her toys. I have to take her back to the vet on the 16th for her next round of shots. Do I need to take her back before then to have this treated?
Probably roundworms. Sometimes false negatives happen with fecals. You have to remember that when a vet checks the feces, they are only looking for eggs in one gram of poop. That's a super, tiny amount. Even though it's tiny, it's usually enough, but not always! If the fecal sample was too old, that could influence it too.

Also, it's normal for them to poop dead worms after they've received a dose of wormer. So that might be what you're seeing. Just a bit delayed. And not all wormers kill all worms.

I would go ahead and wait until the 16th unless she starts feeling poorly again. Make sure you take a fresh fecal sample in to be tested. Less than 4 hours old, or if you must, you can refrigerate for up to 24 hours.
 

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That was really great advice, I also had the issue 8 months ago with my puppy, although the problem was solved with a couple of shots at the vets.
 
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