Honestly, it's usually better to leave a wound open, closing it up can seal bacteria in and set it up for infection. Less likely if it can breathe, and keeping it covered in the ointment keeps it moist which helps the healing process while also providing some protection. Keeping her on clean towels or puppy pads until it's scabbed over can also help with keeping it clean. Poultry cell is good. Here is a link with some pictures of wounds during the healing process, might help, the ones I put in post #3 were from a racoon attack (not my bird), and the bird healed completely and looked normal eventually.
https://www.backyardchickens.com/threads/wounds-pictures-of-how-they-heal.1325817/
The limping could just be from the degree of injury, I obviously cannot judge that since I can't see it.
If you do need an antibiotic at some point, you can use Fish Mox (amoxicillin), which you may have to order online, and give orally. Or most TSC's carry inject-able penicillin G procaine (refrigerated), you will also need syringes. If you have never given an injection before, good explanation here, scroll down to 'give injection' and below that is 'treat with penicillin injection".
https://www.backyardchickens.com/threads/wounds-pictures-of-how-they-heal.1325817/
The limping could just be from the degree of injury, I obviously cannot judge that since I can't see it.
If you do need an antibiotic at some point, you can use Fish Mox (amoxicillin), which you may have to order online, and give orally. Or most TSC's carry inject-able penicillin G procaine (refrigerated), you will also need syringes. If you have never given an injection before, good explanation here, scroll down to 'give injection' and below that is 'treat with penicillin injection".