Black and White and Spider

I bought the bigger of these two 5 years ago as a young black and white reported import ball. She quickly started to pick up cream color and increasing black. She may be what is called an ammonia ball which is thought by some to be a reaction to dirty caging. She is starting to head into shed here but really is fairly striking still 5 years later but I'm not holding out as much hope as I used to that she'll prove genetic.