Got my cat a booster shot this Friday evening and now he’s acting a bit off. Should I be freaking out or is this kinda normal?

I took my cat for his booster shot this past Friday evening, and ever since, he’s been acting a bit off — he's more lethargic and doesn’t seem as interested in his usual playtime. I’m a little concerned because he’s usually very lively. Is this typical after a booster shot, or is there something else I should be looking out for?

Embark Dog DNA Test

Recommended Product

Your dog's DNA could reveal hidden health risks.

Screen for 270+ genetic health risks and 350+ breeds. Veterinarian developed, research partner of Cornell University.

$199 USD
$139 USD
Save $60· Free US Shipping

Answer

It's not uncommon for cats to feel a bit under the weather after receiving a booster shot. Lethargy and reduced interest in playtime are typical, temporary side effects.

  • Lethargy is a common reaction post-vaccination
  • Loss of interest in play is typical but should be monitored
  • Contact a vet if symptoms persist beyond a couple of days

After a booster shot, it is normal for cats to experience mild side effects like lethargy, decreased appetite, or slight discomfort. This is part of how their immune system is responding to the vaccine. These symptoms usually resolve within 24 to 48 hours. However, if your cat's condition does not improve or you notice any serious symptoms like vomiting or weakness, it’s best to reach out to your veterinarian.

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 side effects of cat vaccinations?

    Common side effects may include slight fever, decreased appetite, lethargy, and mild discomfort at the injection site. These typically resolve within a couple of days.

  • When should I be concerned about my cat's reaction to a vaccine?

    If your cat remains lethargic beyond 48 hours, loses significant appetite, or shows signs of an allergic reaction like swelling or difficulty breathing, contact your vet immediately.

  • Can I help my cat feel more comfortable after his booster shot?

    Ensure your cat has a quiet and comfortable space to rest, and encourage hydration by offering fresh water. Gentle affection can also help soothe any stress they might be feeling.

Clinically Approved Standard by Dial A Vet Veterinary Team

Disclaimer: The customer and expert messages presented herein may have been altered with artificial intelligence or modified to enhance readability and safeguard the privacy of individuals. This content is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is experiencing a medical emergency, contact your local veterinarian or emergency animal hospital immediately. Talk to a vet now.

Next available appointment

Loading…