Hmmm, I would say the white one looks ok, even a bit bigger than mine when the vet said she was not bad at all. But she did need a really good, thorough worming. The black one does look a bit too sunk in, and looks like a worm issue. Do they have the runs at all?
I would have to agree with most posters and get a fecal check for parasites.
Have you been to the sister site to this one- Backyardherds.com? There are alot of helpful peeps with goats who might give more advice. Just be prepared to wait up to a day for a response since it is not quite as busy as this site, but its usually much faster.
How are they doing as of today?