Try giving her some of Sparks food when he's there this weekend. See if she eats that.
When I drove to Bluegrass with Paula, Louis didn't want to eat his food (which was the same as Passion's) so I offered Passion's food in her bowl to him and he ate it
Anyway, give her Sparks food in his bowl and see if she eats it. I will bring extra so Stu can fatten him up again
Also, I am going to try to make fatty meatballs so will bring some for her too.