That is awesome that they will be in a home that is better prepared for chins!!!
be prepared with a baby safe cage, wire spacing no bigger then 1/2" x 1/2" and no multi levels as most likely she is pregnant as like with most small animals they come into heat right after baby is born. How old is the baby? They should be weaned around 8 weeks old.
I would be feeding her a good quality chin pellet, small amounts of alfalfa hay unlimited grass hay and give her a cuttle bone(for calcium). Check her teeth they should be a nice rich orange if they are white or almost white she is deficient in calcium.
If baby is older than 3 months I would say no dust baths for mom. They cant have dust baths within 10 days either way of the birth, there is a risk of infection. So if you think she may be due just hold off.