2 September 2024

Post-vaccination reactions

For cats and dogs, vaccines are the first line of defense against many diseases. Therefore, it’s important to keep your pet’s vaccinations up to date.

After a vaccination, it’s important to keep an eye on your four-legged friend to observe any post-vaccination reactions. In the rare event of a severe reaction, contact our team as soon as possible.

Normal post-vaccination reactions

  • Fatigue: it’s normal for your pet to feel a little tired or lethargic after vaccination. This should resolve within 24 to 48 hours.

  • Pain or tenderness at the injection site: it is common for the injection site to be tender for 24 to 48 hours.
  • Slight swelling at the injection site: it is normal to see a small bump at the injection site. This should disappear after 24 hours.

What to look out for

  • Severe pain or swelling at the injection site: if you notice severe swelling or if your pet seems to be experiencing intense pain at the injection site, please contact us.
  • Fever: a slight increase in body temperature may occur in the days following vaccination. If your pet’s temperature exceeds 39.1°C, please contact us.
  • Persistent lethargy: if your pet is extremely lethargic for more than two days after vaccination, please contact us.
  • Persistent vomiting or diarrhea: mild episodes of vomiting or diarrhea may occur, but if they persist for more than a day, please contact us.

Rare but possible allergic reactions

  • Anaphylactic reaction: this is a severe and potentially fatal allergic reaction that can occur within minutes or hours of vaccination. Signs include breathing difficulties, facial swelling, vomiting, diarrhea or severe lethargy. This is a medical emergency! Consult us immediately if you observe these symptoms.

What to do in case of a reaction?

If you observe any of the above reactions, please contact us at 450 322-6060. It is best to act quickly to ensure your pet’s safety and well-being.

Bear in mind that serious post-vaccination reactions are rare. The vast majority of pets have only minor reactions and recover quickly from vaccination.

450 322-6060

450 322-6060