Cetawin
Rest in Peace 1963-2021
*sigh* Do not put peroxide on that wound. One it kills healthy tissue and she needs to regenerate that to heal. Rinse it well with a sterile saline solution or betadine. Put neosporin without pain reliever on it...you can stitch it up but leave a small opening for drainage and get her on antibiotics. Call the vet that treats your dogs and ask him for a script or get pencillin at the feed store.