Prayers winging your way fast! I know it's a stressful idea for Mao, but maybe if she were put in a secure covered carrier behind the trap (so Ming hears and sees her through the trap), Ming may be more apt to go into the trap. Catnip works wonders too, but be sure it isn't blowing outside the trap, or before the trigger mechanism. Fresh stuff ground up, and smeared on the trigger works as long as the trap is large. What pieces of work those people tuned out to be. Siamese don't do well in cold weather, and they didn't even have the decency to call anyone or help?? I'm assuming they've been feeding, otherwise Ming likely would have left the area.