That woudl be such a scare! I'm glad she was just being a picky eater!!
My babies are even picky in the different flavors of brands.
We buy California Natural for my girls, and they love the chicken and rice formula. They gobble it up.
But the problem was that they weren't getting all the proteins that they needed for healthy coats with that diet, and my dad wasn't willing to buy cans of wet food.
The shedding drives my dad up the wall, he buys a different flavor of Cali. Natural, which has more protiens, for kitties with longer fur and more delicate skins, "Salmon and Sweet Potatoes"
Both of them took one sniff, and a questioning nibble, and absolutely REFUSED to eat it unless we doused it with their fish-oil suppliments (which means that every time they ate, they were maybe a few bites away from 'overdosing' on fish oil suppliments). They both lost weight (which is really saying something, since they're skinny to begin with), and we took to mixing in wet food and anything else that would make them like the food.

We're back to the Chicken and Rice formula, and now my dad is more willing to buy them wet food. Next time we go shopping my dad's planning on buying an entire tray of California Natural deep-sea-fish flavor wet food... which actually looks and smells really good. Like actual fish!

We now know better than to ever again buy Clover and Echo anythign with Sweet Potatoes in it, teehee!