Sorry to hear that your Lucy is having a bad molt
I can only imagine how uncomfortable they can be. I think that some nutritional support would be most beneficial. Don't forget that our body needs nutrients to grow, maintain and repair tissue.
First thing that I would do is sprout for her. I have sprouted for mine and they all love their sprouts. As I am sprouting their seed mix, I can honestly say that none of them have rejected the sprouts and I change any new rescue coming into the house the same day with no ill effects. Let me know if you need sprouting instructions, I think I also saw some very good instructions in the forum already. I use the Easy Sprouters and they really are wonderful.
Be sure to include plenty of fresh fruit and veggies, chopped finely and added to their sprouts if they are not big fruit and veg eaters. They may accidentally eat some
You really want to be sure that they get plenty of vitamin A (I prefer beta-carotene as the body converts to fit A as needed) which you find in carrots, other orange, yellow and green veggies.
Cilantro is great to throw in for a gentle detox. If you live on planet earth, anywhere near civilization, you need to detox as the environmental pollution and pesticide pollution gets into our system.
Some fruit that is very beneficial includes pomegranate (messy but less so if you dehydrate it), figs (great for parasites too), grapes, papaya, cantaloupe, watermelon etc.
Calcium is very important as well and good sources include leafy greens (avoid spinach, Swiss chard & beet greens as they contain oxalates which interfere with calcium absorption), boiled, dried and pulverized egg shells. Cuttle bone as well.
Protein is vital as it contains amino acids which are building blocks. Sources include eggs (well cooked), meat products (organic or at least hormone and antibiotic free) well cooked, nuts (soaked to decrease phytic acid content which inhibits nutrient absorption), cooked beans & rice and quinoa for example.
They also require Essential Fatty Acids (EFAs) which you will find abundantly in flax seeds and hemp. These are sources of omega 3 fats.
Lastly (at least for now) are probiotics. This keeps their gut health in line which ultimately will help with better nutrient absorption. Remember to look for avian probiotics.
Hope this helps, feel free to ask for further clarification. As you can see, I can and do go on and on so let me know if you need more info