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My dog accidentally got a horse West Nile vaccine. What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | 8 months and 10 days old | 40 lbs

I accidentally gave my dog the horses west Nile vaccine at 10:30 this morning. The dog is 9 months maybe 40 pounds. Is acting fine eating and everything. What should I do a big vet bills isn't something I can do financially right now.

1 Answer

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on June 11th, 2017

Hello there. There is not much information around on this vaccine being given to a dog. In the one case I could find the dog ended up being fine. Dogs have a natural immunity to West Nile virus so if there was a reaction it would most likely be to the adjuvant (carrier) in the vaccine and not to the virus itself. That being said, I have seen some serious vaccine reactions to vaccines that were given to the wrong species and/or the wrong route. But, I have also seen the opposite where those same type of vaccines were given and there were no reactions at all. It is going to be luck of the draw. I would monitor him for fever, not eating, vomiting, diarrhea, hives, trouble breathing, swelling of the face. etc. If you notice any of these signs I recommend you call your local vet for some advice and get him in for an exam. I can't say for sure but I doubt it would be a big vet bill. He may just need some minor supportive care. That is not something I can predict though. You will just have to see how he does. I hope this helps. Best wishes to you and Panda. Dr. Amber

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