Facebook RSS Posts and Images

Hi there!

We use the Barbie theme and on our Facebook page we use a third party application to take the RSS feed from the theme and post to Facebook (we use RSS Graffiti). I have used RSS Graffiti before on numerous sites, but when I create a post, and set an image to it (using Featured Image), the Facebook post is not showing the Featured Image. The RSS Feed (separate from Facebook) is not showing the featured image.

Is there any way to get the featured image in the RSS feed?

Thanks!