I wonder about Mandy having her "own" room...

I know, I know...a litterbox in the bedroom is not to everyone's liking. Perhaps a small hooded one with a charcoal filter, inside and at the end of a bedroom closet, with deodorizing litter, would help for a while.

That's all I can think of at the moment...unless a spray water bottle on Tommy and Crystal works for them to stop the bullying.

hugs to all your furbabies.