My dog got vaccinated a couple weeks back and now he's suddenly got a fever—could it be related, or should I worry about something else?

A couple of weeks ago, my dog received his vaccinations, and everything seemed fine until today when I noticed he has a fever. I’m concerned that this could be a delayed reaction to the shots, but I’m also wondering if it might be something entirely different. Could the fever be linked to the vaccines, or should I focus on other possible causes?

Answer

It's understandable to be concerned when your dog develops a fever after vaccination. While mild fever can sometimes occur as a side effect, it can also be unrelated, and it's important to assess the situation further.

  • Vaccination reactions usually appear within a day or two.
  • Fever can be a non-specific indicator of underlying illness.
  • Monitor your dog's other symptoms and seek veterinary guidance.

Vaccines are designed to provoke an immune response, and mild fever is a common, short-lived side effect that typically occurs shortly after the shot. However, since it has been a couple of weeks, the fever might be due to another issue, such as an unrelated infection or illness. Observing your dog's overall behavior, energy levels, and any additional symptoms can help guide your decision. If the fever persists, or if other symptoms arise, consult a vet to rule out any potential underlying concerns.

Book a consultation with a licensed vet at Dial A Vet for just $49 AUD if you're unsure or symptoms are getting worse.

Frequently Asked Questions

  • Can vaccines cause delayed reactions weeks after administration?

    Most vaccine reactions occur within 48 hours of administration. A fever weeks after could indicate another issue and should be evaluated by a vet if it persists.

  • What other symptoms should I watch for if my dog has a fever?

    Look for signs such as lethargy, loss of appetite, vomiting, diarrhea, coughing, or any other unusual behavior. These symptoms can provide clues about an underlying condition.

  • When should I seek immediate veterinary care?

    If your dog is experiencing severe symptoms such as vomiting, collapse, seizures, or bleeding, please seek immediate veterinary care.

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