What a wonderful end to her horrible beginings. You and your mom saved this beautiful baby and I have no doubt about that at all! Now she can settle in for a wonderful warm, loving and yummy Christmas with her very own present to open.
You just go ahead and feed that baby chicken, even broiled steak, for as long as it takes for her to build up a nice appitite. I home cook for all of mine, and now have a 13 week old girl that I'm cooking for. It's wonderful to see them loving their meals and being so healthy.
Have you tried putting her food bowl down in the same area with your girl at meal time? They tend to eat much better as a pack. This is what I do for my new baby.