We had one that kept hopping up on a board that was high enough for her to hop over the fence. Her wings were clipped also. She's lay her egg under the compost tumbler then do the same, run around the fence looking for a way back in. If I was there it was fine, but I usually get so busy with the garden I forget to watch. They finally moved the board she was hopping up on.
I hate them in my garden, they do so much damage. But we have a HUGE area for them to free range, if you can call it that.
And only one guinea keet survived.