Were the rat pups fed weekly or did you feed them at the same time? I just want to be a bit more understanding before I offer any advice. I know you say he shed after the first rat pup, but was that one of the three you fed? I've seen some people type stuff up and mistakenly mean something else, so I just wanted to verify.
As far as your pied not eating while in shed that's okay. Some snakes will eat and some won't. I wouldn't worry about you because it's all a matter of preference to the snake. Her striking and not coiling is a defensive measure because something is coming near her, so just let her be until she sheds and then feed regular.