Thanks for reaching out. It's definitely unsettling to have experienced such a situation. A dog's aggressive behavior can stem from various causes, even when it's vaccinated and up to date on its shots. Sometimes, it could be due to territorial instincts, fear, or a past negative experience with another dog. In some cases, medical issues such as pain or neurological problems can also lead to aggression.
For immediate at-home care, make sure both you and your service dog are safe and uninjured. Check your service dog for any signs of bites or injuries, even if they aren't immediately visible. Clean any wounds with mild soap and water and apply a clean bandage if needed. Monitor for signs of infection such as redness, swelling, or discharge.
Look out for any behavioral changes in your service dog, such as increased anxiety or aggression, as these could indicate trauma from the incident. If your dog shows signs of distress or if any injuries worsen, it’s important to seek veterinary attention.
Since this involves aggressive behavior, having a video consult with one of our vets can provide further insights into both addressing your service dog’s well-being and understanding aggressive behaviors you might encounter.
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.

