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Puppy weak, not eating, can't walk after deworming. What's wrong?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Female | 6 lbs

My 3 month old mix breed shihtzu was dewormed 15 hours ago and it seems that she is too weak now. She can't barely walk. After being dewormed, she only got a few dose of food (force feed). Please help me. It's my first time to have a puppy and it's making me so sad to see her like this.

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2 Answers

Most Helpful Answer

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Answered By Ana M, DVM

Veterinarian

Published on June 12th, 2019

Thank you for submitting your question regarding Maze. I recommend that she sees her veterinarian right away. This is a dramatic response to a dose of deworming medication. If she had a very large parasite load, the dewormer could make her ill as the worms die off. However, most puppies are not as sick as you have described. She could also have another disease that presented at the same time. Regardless, she needs veterinary care. I worry that her blood sugar has dropped low as she is not eating well. This can make a puppy weak and wobbly. I hoep this information helps and you get her feeling better soon.

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    Answered By Jenna Beyer, DVM, MBA, cVMA

    Veterinarian, Certified Veterinary Acupuncturist

    Published on

    I would be concerned that either she had a very large worm burden and all of the worms dying at once are hard on her system, or that she is sick with something else. I would recommend that Maze be rechecked by the vet to see what is going on. She may need supportive care until the worms or other issue passes.

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