Griffin, try and keep everything in one post. You will get many more responses that way.
As for the food. Any cat should be on a good quality diet every day. If a cat is pregnant they should be eating kitten food and canned kitten food if they tolerate it well.
The queening box should be at least 3ft by 2ft for a small cat. A lot of breeders I know buy a tokeo cage for moms and thier kittens. You just want to make sure mom can get in and out and the kittens cant scoot off somewhere.