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Question:

B12 Shot Gone Wrong, Did I Just Hurt my Cat?

I'm really in need of some advice and reassurance right now. I've been caring for my sweet cat, Luna, who's been a little under the weather lately. Our vet suggested B12 shots to help boost her energy and overall health, and I thought I did everything right. I watched the vet closely during her last injection and was careful to follow all the instructions, but today's shot didn't go as smoothly. As soon as I injected the B12, Luna yelped and jumped away, which she's never done before. Now she's hiding under the bed and won't come out, which is so unlike her. I'm terrified that I might have done something wrong. Could I have hurt her, and how can I get her to trust me again? She's my little fur baby, and I feel awful. Any advice or similar experiences would really help me calm my nerves. Thanks in advance, everyone!

Answer:

Hello there,



First, take a deep breath. It's understandable to worry when something doesn't go as planned. B12 shots are generally safe, but sometimes complications can arise. If your cat seems to be in pain, shows swelling or redness at the injection site, or behaves unusually, these could be signs of irritation or localized infection. Another rare possibility is an allergic reaction, indicated by symptoms such as itching, hives, or difficulty breathing.



For now, monitor your cat closely. Ensure they're comfortable and keep their environment stress-free. You can gently apply a warm compress to the injection site to alleviate discomfort. Avoid any rigorous activities that might agitate the area further.



Watch for any lingering signs, like continued swelling, fever, lethargy, or refusal to eat or drink. These symptoms might suggest a more serious issue needing professional attention.



Remember, you're doing your best, and I'm here to support you. If you're still concerned or notice any worsening signs, please consider booking a video consult with Dial A Vet. This will give us a better idea of what’s happening and how best to help your furry friend.



Take care!

Answered by

Louise - Senior Veterinary Nurse, Dial A Vet

June 23, 2025

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The "Ask a Vet" forum on Dial A Vet offers general information and helpful tips on pet health, but it's not a substitute for professional veterinary care. The advice here doesn't create a veterinarian-client-patient relationship, and our vets can't diagnose or treat your pet remotely. For emergencies or specific medical concerns, always contact your local veterinarian immediately. Your pet's health is unique, and decisions should only be made after consulting with a qualified professional. By using this forum, you acknowledge these limitations and agree to seek in-person veterinary advice for all your pet's health needs. View our content guidelines.
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