Maybe during the interview ask the girls questions like.
How did they become a scatmistress?
What techniques do they use to prepare for a feeding? Do they save up for 2-3 days?
What were the top memorable feedings that they can remember?
What is it like to work with the other girls, is it hard to work with other girls?
How do they get comfortable in front of the camera?
What do they like best about a scat slave? Fast eating? No complaining?
Maybe during the interview ask the slaves questions like.
How long did you fantasize about it before you actually did it.
What are your favorite types to feed from , Diarrhea? Solid? Hard? Soft?
What flavors do they experience?
Do the girls tease you?
Have you ever consumed so much that you had to give up?
These are just a sample of possible questions. I am sure you can come up with better ones.