Not necessarily due to not liking the taste or not wanting to eat stuff. It's more along the lines of not having an appetite or hunger - which helps - combined with feeling sick to the stomach if she eats too much. And by "too much", I mean more than about 5-6 bites.

So she'll have her small meal, and everything else is unappealing. She might be tempted to have a piece of candy - but she won't be having more than one due to the potential consequences.