Petco Text Logo
Petco Pet Logo

  • Two Easy Ways to Start Earning Rewards!

My dog is vomiting and has diarrhea after deworming. Is this normal?

Updated On September 23rd, 2025

Pet's info: Dog | Yorkshire Terrier | Female | unspayed | 1 year and 10 months old | 3.4 lbs

My dog was given deworming medication this pst Saturday. She was given Pyrantel endoparasite and revolution ectoparasite. Her stools were normal on Sunday. On Monday she didn’t poo at all. And all day Tuesday she was throwing up and pooing diarrhea. She would poo sometimes very dark brown and sometimes orange with a couple blood spots and little white things. I don’t know if this is normal. She seems to not feel sick she’s still hungry and drinks water but I’m very concerned!!!!

This question includes photos that may contain sensitive content. Click to view.

View more to consider that the photos may include sensitive content.

2 Answers

Most Helpful Answer

Image profile

Answered By Justin Plunk, DVM

Veterinarian

Published on June 20th, 2018

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! I am sorry to hear Hazel is vomiting and having diarrhea. Her condition is not normal, and I would recommend following-up with your veterinarian this morning as soon as they open for a reassessment appointment. She may need some labs ran to ensure nothing major is wrong internally which is something for you to discuss with your vet. At a minimum, it is likely she will need anti-nausea medication as well as some medications to help with the diarrhea. If left untreated, she could become very dehydrated which would make her extremely sick. It is much better to get on top of these things before they become a bigger problem. I hope this helps and that Hazel's condition resolves quickly!

Vote icon

1Pet Parents found this answer helpful

Other Answers

  • Image profile

    Answered By Lindsey Edwards MVB, BSc, IVCA

    Veterinarian

    Published on

    Diarrhea following deworming treat me is not uncommon, especially if worms were present. As long as her appetite is good and there is no persistent vomiting i would not be overly concerned. A probiotic such as fortiflora with added fiber can be helpful for recovery

    Vote icon

    0Pet Parents found this answer helpful

See More Answers

Related Questions

Petco Pet Education Center
Health & Wellbeing
Why is my mouse's eye swollen, cloudy, and has pus?
Is your mouse's eye swollen, cloudy, and pussy? Dr. Melanie, a certified vet, discusses severe eye issues like infection or abscess, urging an immediate visit.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
What fish dog food helps dry skin if my dog eats Science Diet?
Is your dog's dry skin a concern? A certified vet offers expert advice on finding the best fish-based dog food alternatives to Science Diet for essential oils.
Updated on February 04, 2026
Petco Pet Education Center
Health & Wellbeing
My pet is breathing hard, not eating, and lethargic. What's wrong?
Is your rat breathing heavily, won't eat, and has no energy? A Licensed Vet Tech explains potential causes like infection and age, urging a vet visit for diagnosis.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My pet has red spots all over. What's causing them and what to do?
See red spots on your pet? A certified Petco vet discusses common causes like allergies, infections, or mites, guiding you on diagnosis and treatment options.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My small pet is limping and can't bear weight. Should I see a vet?
Is your pet limping and can't bear weight? A certified vet explains why a suspected fracture needs immediate diagnosis and safe pain relief. Get expert guidance.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My dwarf hamster has a shut eye and is limping. What should I do?
Is your dwarf hamster struggling with eye issues or limping? A trusted vet offers expert guidance on symptoms and crucial next steps for comfort and care.
Updated on December 04, 2025
image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Book Now

Sponsored