The episode in question was in season 6, "Chain of Command, Part II".
The little Cardasian girl, Jil Orra had a pet wompat, played by a ferret.
James (huge fan), Melissa, Kassidy & Jasmine
Loving: Bebe, Riley
Missing: Wheezer, Pym, Rikki, Jako
[Posted in FML issue 4283]