@winni you could try to make some chicken broth, just boiling the chicken with some salt without water, and mix her food with it to dampen it. i had to do that when i first got my puppy, and it was advised by the breeder too. and it made him eat his food
from what i've heard, puppies get stressed easily, like moving to new places, and they might not try to eat.
as for bath tips... i'm not sure if i have any tips for you since i'm still getting used to it myself.. lol
and if she's pottying in the crate, the crate may be too big for her, or that she just can't hold long enough.