Palpating at 10-14 days is the most sure way to tell. Rabbits don't get a baby bump, so thats the closest thing. Behavior is also a huge give away. If late in the gestation period she starts being really mean, and eating more, she's prob pregnant. I wouldn't wait to see fur pulling to determine pregnancy. Most does don't pull fur until right before giving birth. Slowly increase her feed until kindling, the free-feed her until the kits are weaned.