Rhondda came for breakfast today, and was off for at least 30 minutes. She seemed to be in good shape. Then I saw her again at 9.15, so went to investigate; her nest has been discovered. Only one egg remains, with some shell of 1 or 2 others, the rest are just gone. I’m guessing rats or other rodent. So it turns out that it was not a good enough site; but she’s safe, and that’s what is important, and hopefully she's learned an important lesson. I'll be relieved when she comes back to the coops to roost and lay.