Petco Text Logo
Petco Pet Logo

Giardia in one dog. Should I test or treat my other asymptomatic dogs?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | neutered | 20 lbs

I have four dogs living in the house. One has giardia and is getting treatment. Should I assume and treat the other three OR get them tested and then treat if they are positive? The dog with giardia is not separated from the rest (as it is difficult to seperate them in my small house). Also, the other three dogs are not showing symptoms. Thank you!

3 Answers

Most Helpful Answer

Image profile

Answered By Sarah Derksen, DVM

Veterinarian

Published on November 12th, 2018

I would recommend monitoring the others for signs, have the fecals of all checked when done w medications. I also recommend picking up feces right away to help decrease chance of spread as well. If you feel more comfortable treating all at once that is ok too, and you can talk to your veterinarian about it too. Good luck

Vote icon

1Pet Parents found this answer helpful

Related Answers from Veterinarians

  • Image profile

    Answered By Destini R. Holloway, DVM

    Veterinarian

    Published on March 3rd, 2017

    Once your pet treats tests negative for oocytes (eggs) then that means she isn't shedding anymore Giardia around. Older dogs are less likely to get Giardia because of their developed immune system, which is why we often only see infection in puppies. Puppies are not lifelong carriers but some puppies can become carriers for an extended period of time, and in these cases they will continually test positive, but will be asymptomatic (no diarrhea). To help prevent spread to your other pet, I would recommend picking up the feces and cleaning up any accidents in the home with diluted bleach. But as mentioned earlier it is often predominantly an issue in puppies and immune compromised pets only. Take care of those fur babies and I hope Pepper gets over her infection soon!

    Vote icon

    2Pet Parents found this answer helpful

  • Image profile

    Answered By Ana M, DVM

    Veterinarian

    Published on September 18th, 2018

    Thank you for submitting your question regarding your dogs. Giardia is spread by a fecal-oral route. I typically will treat all pets in the household if one is affected. Adult dogs can be asymptomatic carriers meaning they can have and spread the disease without showing symptoms themselves. You need to scoop all the poop in the yard frequently. The toys and dishes should not be a source of infection unless they have been contaminated with feces. The dogs should avoid dog parks and similar areas where they potentially spread the infection to other pets. Good luck!

    Vote icon

    1Pet Parents found this answer helpful

See More Answers
image
Have A Vet Question?

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

Sponsored