It does sound and look like some type of respiratory issue - extending the neck to breath.
If she is doing this mostly at night, then I would suspect Infectious Bronchitis (IB), but there are several respiratory illnesses that can sound like this.
You may want to separate her and offer some extra poultry vitamins in her water. Supportive care can include something like VetRx. Antibiotics like Tylan50 or Oxytetracycline may help with any secondary infections, but usually with IB they are not that effective.
Look for any other signs of illness like discharge from the eye/nose or facial swelling.
Here's more information on common poultry diseases:
http://edis.ifas.ufl.edu/ps044
If she is doing this mostly at night, then I would suspect Infectious Bronchitis (IB), but there are several respiratory illnesses that can sound like this.
You may want to separate her and offer some extra poultry vitamins in her water. Supportive care can include something like VetRx. Antibiotics like Tylan50 or Oxytetracycline may help with any secondary infections, but usually with IB they are not that effective.
Look for any other signs of illness like discharge from the eye/nose or facial swelling.
Here's more information on common poultry diseases:
http://edis.ifas.ufl.edu/ps044