
time is what it will take if she is otherwise fit and healthy, has normal stools etc.
I have here a fit 11 year old who many think is younger than her daughter, she was practically anorexic until she had a litter at two years old, was in fab condition while rearing and until her next season then did the miss meals a few times a week as before.
I let her get on with it.
By the time she was fully mature she was in fab condition by 2002 when she was five, and won a RCC and many Limit classes, previously she had a lot of seconds and thirds saying she needed to body and coat up.
Just leave her too it feed a good quality calorie dense easily digested food, and wait for maturity to do it's thing. My Kizi is a sneaky food thief now.