No stitches; only clean wounds treated in the first few hours should be stitched. She needs to heal from the edges in so the wound can drain. No need to remove feathers or dress it, certainly no need to butterfly. Just clean with a bit of saline or mild soapy water and apply Neosporin or the like once or twice a day. You can also clean with dilute Betadine or peroxide but it's best to rinse them off and only use them once or twice. Just be sure you don't use an ointment with a "caine" drug such as cetacaine, benzocaine, etc. You'd be surprised how well they heal. It's also a good idea to keep them indoors for the healing so flies won't lay their eggs in the wound, which become maggots. Or, there are products (probably in the horse section) that keep flies away. BluKote is mildly antiseptic and will nelp hide the wound from other chickens if you have her in with the flock.
