Oh my gosh.
I teared up from reading this. BLESS HER! And YOU for caring! I can barely think of what her world was before she found you. I bet she will blossom over time.
I bet she wants to eat in her locked kennel bc that's what she was used to (and to "keep it safe" from other dogs). Poor honey. She will probably change about that as she learns about her safety with you. To get her to drink, you could sweeten her water a touch w/ some Karo or Honey or Pedialyte.
For eating, it sounds like you're waiting to r/o an enlarged liver, right? I wonder though, in the mean time, if you could get her a lower protein canned food to mix in w/ her dry and see if it would stimulate her appetite.
I hope she is okay, please do keep us posted on this little punkin'.