He is definitely pale in the face and the feet as well as underweight. I haven't followed the emergency thread, so obviously follow any advice given there. I'm not sure what their set-up is like, but I would move them to pasture during the day with only a scoop or two of grain/pellets and see if you can't get him more interested in eating some greens to put on some weight. If they have access to a kiddie pool, the next time you empty it you might try tossing a few handfuls of a frozen veggie mix with peas, carrots, corn, and green beans onto the surface of the water for him to bob for.