Also, if we can be completely sure that Mr. Wheeskers' hidden is Dreamy and not a yet unknown ultra-recessive, then a few more of the same pairing could also help: if his shown and hidden is Dreamy and if they produce OdyFrazzy then we can assume that it is dominant and not recessive to Dreamy, and at the same time this will prove that one of Ms. Wheeskers' parents holds Dreamy or maybe even a higher unknown.
Whatever the outcome, good luck and congratulations on your super discovery