Buzzard trouble?

I have seventeen free range hens of mixed breed - the only losses that I've suffered so far have been the result of the farmer next door's dog and a starving cat during the last terrible winter.
My second oldest hen is supposed to be a sussex light, but she's very small. She was in the hen house yesterday morning and nowhere to be seen last night at bedtime. I hunted everywhere but no sign - no feathers, blood - nothing.
She has never shown any interest in being broody and is now four years old, so I think it's unlikely that she's setting up home in a hedgerow somewhere.
All day the rest of the gang have been hiding under bushes and looking anxiously skywards. There are buzzards around all the time but I think that the local pair have raised a good brood this year - they are hanging around very near to the garden and yard.
I've looked at old posts and the consensus seems to be that buzzards wouldn't take a hen from a hen run - but mine are free range and while there is plenty of cover, there is also a fair bit of open grass.
Could it be a buzzard? There are peregrines nearby too but I've only seen them take birds in the air.   

Ohh, I'm sorry to hear that. Not sure on the buzzard, but I hope your hen comes back safely.

Phew!! I'm glad she came back.

yes I know what you mean, I was out in the garden all day yesterday - gardening to the music of baby buzzards - very irritating...

maybe because the cockerel was standing guard and more obvious than the little hens? - it was doing it's job - poor thing.