Well, congrats on the rescue and your sucess with her. There is such good feelings seeing baby snakes showing up planned or unplanned. Congrats again. Depending on what literature you are reading, averages vary on litter sizes but are usually multifactorial. Including but not limited to the health of the parents, age, genetic background , enviornment and nutritional status. I would think a injury during pregnancy could impact overall health and affect litter size. Litter sizes from 4 to 94 (give or take ) can be considered when taking into account the factors mentioned. As far as the babies eating, any movement that they see gets perceived as a threat at these young ages and will make them hide rather than eat. I would consider putting any food for the babies onto a shallow lid or cap and left on the floor of the enclosure. They're driven by a escaping behavior as babies and are very shy always looking for a place to hide. Wriggling food at them will only make them more wary and decide to flee.