Fur pulling is usually associated with kindling, but it is a behavior that is done in response to a hormonal signal. Rabbits don't go "in heat" like some animals, but their hormone levels rise and fall. Some does pull fur when they hit a hormone peak; it can be a real nuisance to have a show rabbit pulling out her hair just before a big show, but it can be a useful sign if you are trying to get a doe bred. And as mentioned, it can be an indicator of a false pregnancy, though that usually happens after another rabbit has been mounting the doe.
Now, this is waaaay out there, but it is possible for a doe to be bred, and have embryos that form but don't implant at that time. These embryos can implant even months after the doe was bred, leading to a litter born much more than 31 days after the doe was bred. So yes, it is just possible that the doe really is preparing for a litter.