The Winner is: Lady Jocelyn Stewart (and Duncan the Cavialer King Charles Spaniel)
And the two runners up come from:
Lady Hartley of Lochaber Highland Estates with this image of her pet Ferret in a Scottish get-up:
And in third place, although not technically a pet, comes from Lady Amanda Jane Kathryn Ann McLean and features her bear Lord Alistair in his best highland attire.