My cat's back fur looks all puffed up and he’s hissing for no reason—could he be having a bad reaction to the vaccine he got yesterday?

Yesterday, my cat received his vaccination and today I've noticed that his back fur is all puffed up and he's been hissing for no apparent reason. It's really unusual for him to act this way, as he's normally quite calm. Could these changes in his behavior and appearance be a bad reaction to the vaccine? Should I be concerned about this?

Answer

It's understandable to be concerned when your cat behaves differently following a vaccination. Changes like puffed-up fur and hissing can occur after vaccinations, but let's explore if there might be any cause for concern.

  • Monitor for any additional symptoms such as vomiting or swelling at the injection site.
  • Unusual behavior can sometimes be a transient reaction to stress or discomfort.
  • Most post-vaccine reactions are mild, but always best to stay observant.

Vaccinations are vital for your cat's health, but sometimes they can cause mild side effects. Puffiness or agitation might be due to mild discomfort or stress from the visit itself. However, if you notice any severe symptoms such as persistent vomiting, severe swelling, or if he seems in distress, it's advisable to consult with a vet. These reactions can vary, and while uncommon, it’s important to ensure any serious adverse reactions are addressed promptly.

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

  • What are common vaccine side effects in cats?

    Common side effects include mild fever, slight swelling at the injection site, and decreased appetite. These are generally short-lived and resolve within a day or two.

  • How can I ease my cat's discomfort after a vaccine?

    Ensure they have a quiet, comfortable place to rest with access to food and water. Gentle petting and reassurance can also help soothe them.

  • When should I be worried about my cat's reaction?

    If your cat shows symptoms like persistent vomiting, difficulty breathing, or severe swelling, contact a veterinarian immediately. It's always better to err on the side of caution.

If this is an emergency, please seek immediate veterinary care.

Next available appointment

Loading…