1. Try to remove the nail if it's still in the foot. If you can see the nail, try to remove it with a pair of tweezers. If the nail is broken or embedded, leave it for the vet to remove.
2. Wash the wound and surrounding area with soap and water. This will help to remove any dirt and bacteria that may have gotten into the wound.
3. Apply a clean bandage to the wound. This will help to protect it from further contamination.
4. Keep your dog off of its injured foot. This will help to prevent further damage and discomfort.
5. Give your dog pain relievers if necessary. If your dog is in pain, you can give them a pain reliever such as ibuprofen or acetaminophen (Note: Do not give Acetaminophen to cats). However, it is best to consult with your veterinarian before giving your dog any medications.
6. Take your dog to the vet as soon as possible. The vet can examine the wound, remove the nail (if necessary), and prescribe antibiotics or other medications to help your dog heal.
Do not try to remove the nail yourself if it is deeply embedded or if your dog is in severe pain. Trying to remove the nail yourself could cause further damage to the foot and could lead to infection.
Rusty nails can cause serious infections, so it is important to take your dog to the vet as soon as possible.