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Why is my dog's neck swollen with fluid after a lepto vaccine?

Updated On September 23rd, 2025

Pet's info: Dog | American Pit Bull Terrier | Male | unneutered | 2 years and 2 months old | 65 lbs

My 2 yr old pit had a lepto shot this sat in his neck and today it's swollen w fluids

1 Answer

Most Helpful Answer

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Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

Veterinarian

Published on April 11th, 2017

This is a local reaction that should resolve in few days. Usually nothing to be worried about if there are no other signs (like lethargy, inappetence or vomiting/diarrhoea). If still persistent or getting worse in the next 48 hours I would recommend an immediate check up. Please do not hesitate to contact us again on the forum or by requesting a consultation (where you can post pictures ) if you have any more questions or to discuss it any further.

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