We used to have two Flemish Giants - a male and a female. The female would go into a molt two or three times a year. She would barely be finished with one before she would go into another one. Seemed like she was always shedding her fur. Our male only did it twice a year. We asked our rabbit savvy vet about these molts and she said that anything can trigger them - they don't shed like dogs do (according to season typically). Stress can bring them on, or even another rabbit molting can bring on a molt. That has happened with our three rabbits we have now - when one molts, the other two seem to go into a molt as well. It's the most bizarre thing. Just keep brushing her as much as possible, remove the excess fur from her living space, and if you see her poos start coming out as being strung together (they call this strings-of-pearls), you will want to keep a watch on her to make sure that she doesn't get any kind of fur blockage. Also, make sure she has plenty of hay because that will help keep things moving.