chickens are amazingly smart animals so she has a good chance just make sure she get water in her system and make her temp doesnt go to high and keep her comfortable and do what you can your her mom so it what your can do
i found a bird vet i dont know whee you are but its worth a shot
Avian & Exotic Animal Clinic
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4.6Address: 9330 Waldemar Rd, Indianapolis, IN 46268
Hours:
Open ⋅ Closes 4PM
Phone: (317) 879-8633
your hen should be okay just keep and eye on her try using natural antibotics like parley or orgenio so good luck to her i would try feeling her abdomen to see if she if she has any soreness or any abnormal masses just in case good luck to your hen hope she gets better