I'm just seeing this. Claudia, is there anything else physical going on with her---loose stools, off her food, signs of pain? I know how finely attuned to your three you are, and she is probably just as finely attuned to you. This move is BIG. Has anything this big happened since she's been with you? They say moving is one of the biggest stresses for humans (even good stress, like a wedding, is stress), and surely they know something is up. They are such creatures of habit---just like Wayne knows which day to expect the trashman.
My Tess, who is certainly not, bless her heart, the brightest of Greyhounds, knows the difference between a week-day and the week-end, early in the morning, even though Doug does nothing different if he leaves the house except for wearing his uniform on week-days, and not on week-ends. Monday through Friday, Tess is fine with him leaving, Saturday, if he goes out without her, the wailing can be heard for blocks!
And they ALL know when we're going on vacation.
I do have a feeling that this is the case with Ekko. Hey, how are the boys? Not quite as perceptive?
In any case, we'll certainly be sending some white light and soothing thoughts out to your sweet girl along with prayers for you, for as safe and stress free move as possible.