Molting or heavy shedding can occur somewhat sporadically in rabbits, but the norm is once every 3 months. I’m not entirely sure what the scientific or bioligical reasons for this are, as it doesn’t really correlate with the seasons, but one thing is for sure – it happens!
That flea comb you have is good, but consider getting the HairBuster, which has additional rubber grips on the teeth. That brush is sold here at the BB store. The soft brush is good, too.
Plucking the loose fur is definitely the most effective way to remove large quantities of loose fur. You will see the fur that is about to fall off, and you should be able to pinch and remove with basically no effort at all. Don’t pull hard!!
If your bun isn’t too cooperative, try offering some of her favorite foods – pellets or greens! This doesn’t work for all rabbits, but the distraction can be enough for some. Then you can groom and pluck to your heart’s desire.
If that doesn’t work, though, you may just need to be sneaky and do it when she isn’t looking. She will likely run away from you, but keep at it for a couple minutes a day, and go for the biggest, loosest fur. You can also dampen your hands and run them across her body to remove very loose fur. The importance of this is just as guessed, so that they don’t consume too much fur, which could result in a blockage. Papaya enzyme tablets once a day or every other day can also help break down ingested fur. It’s not as strong as some people will say it is, but it does help the acids in the stomach!