When I first saw your thread I felt so bad thinking, "Poor Luna, not again!" She's such a sweet little kitty girl. Interesting that your vet said certain antidepressants have shown some positive results with this sort of problem. My thoughts and prayers are with both you and Luna that something can be done to end her discomfort and ease your mind. Please give Luna and Lily some scritchies from me? And please let us know how Luna is doing?