Old hen making funny sounds
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Can you post pictures and/or video?
Can you take her to a vet?
How old is she?
Do you have her separated or quarantined from the rest of your flock?
Sounds like a respiratory illness. Any runny nose/eyes, discharge or coughing?
Stress of being moved to a new environment can make symptoms of an existing illness worse.
Here is a list of illnesses/diseases common in poultry, there is a symptoms chart at the bottom of the page: