Also you can go to your quarters, which is nexto Erevis and buy better food and equipment for prisoners. Give better quality of life in the cell to your captives and her mood shall increase. Also her mood will increase by giving orgasms to breeder. After couple of them she shall not sit in the corner of the cell but stay behind it - one hand on the bars and other on her hips, and a delicate smile... This was the best mood i saw from breeder.
Also at best mood she can produce two eggs instead of one.