She wouldn't go to bed Saturday night and was acting all odd in the run so I convinced myself she was egg-bound, brought her inside and had dh hold her on the kitchen table while I explored her vent very gently.
DH said "neither her nor I were expecting our Saturday night to turn out like that". She clucked loudly and was most surprised.
She wasn't egg-bound as far as I could tell so I greased her vent and put it back in the house.
This morning my husband helped me to catch father jack Hackett, wash her bum and trim her feathers around her vent. Not a brazillian or a landing strip or anything, just a light trim to stop her feathers going all claggy. It was not what he hAd expected to do this morning, so he says.