Do you, or they, have a cock/erel?
Might be good to band your birds so you know which are yours?
Oh, and....
Welcome to BYC! @23zwilson
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Please add your general geographical location to your profile.
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I hope your hen has come back, but I am in a similar situation. What would you have said if they did have a rooster?
We had a chicken go missing last night, and one of our roosters is injured, which makes us suspect a predator. We have two roosters so at first my husband thought they’d been fighting, but we then noticed the coop door was left opened

, and the missing hen. Again I hope your hen returns, and ours as well. Our first chickens so it is a hard loss.