My cat had a vaccine reaction, and now he won't eat, what should I do?

After getting his vaccine yesterday afternoon, my cat hasn't been interested in his food at all. He's usually such an enthusiastic eater, so this change is really worrying me. Is this a normal response to the vaccine, or should I be looking for other symptoms and consider taking him to see a vet?

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 experience a temporary reduction in appetite following vaccination. This usually resolves within a day or two, so monitoring your cat for improvement is important.

  • Monitor your cat's behavior and appetite for any signs of improvement.
  • Watch for any other symptoms like vomiting, diarrhea, or lethargy.
  • Be prepared to contact a vet if your cat's condition does not improve or worsens.

Vaccines are designed to protect your pet from serious diseases, and while they are usually well-tolerated, some cats may experience mild side effects like a loss of appetite. Keep an eye on your cat for the next 24 to 48 hours. Make sure he has access to fresh water and a quiet, comfortable space to rest. If your cat's appetite doesn't return, or if you notice other symptoms like vomiting, diarrhea, or extreme lethargy, it's best to consult with a 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 vaccines in cats?

    Common side effects can include mild fever, decreased appetite, and slight lethargy. These symptoms are usually short-lived and mild.

  • How long will these symptoms last after vaccination?

    Most cats recover from mild vaccine side effects within 24 to 48 hours. If symptoms persist, consulting with a veterinarian is recommended.

  • When should I be concerned about my cat's lack of appetite?

    While a temporary decline in appetite can happen, if your cat refuses to eat for more than 48 hours, or if there are additional concerning symptoms, seek veterinary advice.

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…