Don't go mad giving her bike work she still pup bones joints ligaments still developing trotting away on hard surface could damage that plenty free running keep her fit enough,you don't need her super fit to run 2/3 rabbits and when you start her that's all you want to be doing and always try and end on good note with her keep her confidence sky high,she will tell you when she wants more you will see difference in her once she had few rabbits best luck.