Starve her into submission or indulge her?

So, as you may have gathered from my last post, Young Miss Weaver is throwing up again. We have an appointment with the vet for Saturday morning. In the meantime, I've put her back on the gastro-intestinal diet that she loathes, and for several days she's been eating zilch. Or to be precise, she eats the gravy of the gastric food, but leaves all the chunks of meaty deliciousness. Or meaty disgustingness, as she evidently feels. But she cries for food all the time. Stalks the refrigerator, hangs around meowing plaintively when I'm getting food for myself, etc, etc. This evening I finally cracked and cooked her a chicken thigh. She devoured the small piece I gave her, and hasn't brought it back up again yet. Yet.

My mother thinks I'm handling it wrong. She says when YMW gets hungry enough, she'll eat the vet-approved gastric food, and that by pandering to her with the chicken I'm just delaying the inevitable. I should keep putting out small amounts of the gastric food and eventually she'll choke it down in order to stave off starvation. My head says my mother's probably right, but on the other hand, it's really frelling tough to ignore an animal who's crying for food.

In my situation, what would YOU do, oh wise pet staff on my f-list and dwircle? Thanks in advance for the advice.