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Hi, this is Dr Reupert. Dog attacks can be very traumatic for everyone.
If you can you should inspect the area closely to determine if the puncture went very deep. My major concern would be a subcutaneous infection and tearing of the underlying tissue that could result in a fluid accumulation called a seroma, Clip the hair around the puncture so you can monitor for signs of infection such as drainage, redness and pain. The infection may take 48 to 72 hrs to appear. You can apply neosporin to the puncture wound.
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My major concern would be an infection. A fluid sac of tissue fluid would also be a possibility(seroma), but that would not be as serious as an infection. If a swelling develops that becomes more painful, that would indicate an infection, and you should see a vet as soon as possible.