What should you know about canine tetanus?

The illness begins when Clostridium tetani bacteria enter a wound, often a puncture or injury contaminated with soil. The bacteria can release a toxin that interferes with nerves controlling muscles. Affected dogs may develop stiffness around the jaw and neck, difficulty opening the mouth, an unusual rigid posture, muscle spasms, trouble swallowing, or sensitivity to noise and touch. Signs can start near the wound and then become more widespread. A wound may be small or already difficult to see, so the absence of an obvious injury does not exclude tetanus.

Contact a veterinarian promptly if your dog has progressive stiffness, spasms, swallowing difficulty, or a recent contaminated wound. Keep the dog in a quiet, dim area and handle gently because sudden stimulation may trigger spasms. Do not force food, water, or medicine into a dog that cannot swallow safely. Treatment may include wound care, medicines to control spasms, antibiotics, fluids, and careful nursing support. Recovery can take time, and the veterinary team may need to monitor breathing, hydration, and eating.

Seek emergency veterinary care if your dog is struggling to breathe, cannot swallow, has repeated whole-body spasms, collapses, or becomes unable to stand. Go promptly after a deep puncture, bite, or dirty wound if stiffness or abnormal muscle movement appears. Do not wait for symptoms to settle at home. A veterinarian can clean the injury, assess muscle and nerve signs, and decide whether observation or hospital treatment is needed. Discuss prevention and wound management, including tetanus vaccination where appropriate.

Ask which signs should trigger an immediate return, how the wound should be cleaned, whether your dog needs hospital monitoring, and how to provide food and water safely during recovery. You can also ask whether vaccination is suitable for your dog and how to reduce the risk from future puncture wounds.