I'm thinking your hen will be just fine. My hen had a huge gash from a dog, it was a journey, but she got better. If you care to see, this was her journey.
https://www.backyardchickens.com/t/733295/poor-marble-got-bitten-by-a-dog-vetwrapo
Good luck with your girl!
https://www.backyardchickens.com/t/733295/poor-marble-got-bitten-by-a-dog-vetwrapo
Good luck with your girl!