Shannon, I think what you are experiencing with your birds is all quite natural. During moult, it is very common for the bird's comb to turn pale. They have shut down their lay cycle to allow their body to develop and grow new feathers. This is all very hard on birds and they just need time to come through it. A vitamin supplement is a good idea when they go through a late moult like this and I would encourage it. A late moult is not unusual and I have 2 buff orps who are finally going through their moults. Otherwise, I would not change a thing until her moult is complete. Then reassess their condition and overall appearance.