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My puppy was dewormed, but I see no worms. Is he still sick?

Updated On September 23rd, 2025

Pet's info: Dog | Yorkshire Terrier | Male | unneutered | 2 months and 16 days old | 3.63 lbs

So what if we gave him deworming and see no signs of worms what other thing could it be? And when will i see sign of worms im stools if any? Can worms make him feel like this?

2 Answers

Most Helpful Answer

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Answered By David Darvishian

Veterinarian

Published on December 14th, 2017

Hi and thanks for using Petco Pet Education Center, formerly Petcoach! Sorry to hear about Bruce. Sometimes when pets are dewormed no dead worms are seen in the feces. This can be completely normal. Typically if worms are passed it's within 12-24 hours of the deworming dose. Intestinal worms can be very devastating in puppies not only robbing nutrition from the gut but also blood. Hookworms attach to the lining of the intestine and feed off of blood. This can be significant enough to kill a small puppy. If you add some fleas on that puppy who also suck blood, puppies can get into real trouble. So with intestinal worms, you can see low red blood cell counts (anemia), abdominal distention, low or no appetite, abdominal cramping/pain, nausea, vomiting, diarrhea, loss of energy/lethargy, poor skin condition, poor hair coat, shock, and even death secondary to the anemia/loss of appetite, etc. You should deworm every 3 weeks for hookworms and roundworms for at least 3-4 treatments. Good luck

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Other Answers

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    Answered By Megan, DVM, CVA

    Veterinarian

    Published on August 14th, 2017

    This is actually true! When they get dewormed, the worms will sometimes die and disintegrate so you never actually see the worms passc. Due to their life cycles, I would have him redewormed 3 weeks after the original deworming to make sure you get rid of all of them. I hope this helps!

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