So far so good!  We’ve been letting both cats roam the whole house while we’re home this weekend, and we haven’t had to sweep up any chunks of cat hair yet.  Soiree definitely doesn’t like it but she hasn’t chased after Vanilla without reason.  “Reason” being 1) Vanilla gets too close, 2) Vanilla stares too hard, 3) Vanilla thinks about using the cat door to the back deck (apparently that’s Soiree’s door).  Vanilla is mostly happy to keep her distance and doesn’t seem to be too concerned about that crotchety old black cat.