Oops I meant BPA free toys of course!
There are also a lot of environmental toxins that can cause premature puberty so there are causes childen are more frequently having this problem, do some research online there are many good articles out there.I agree about getting a 2nd opinion ..
You should feed your daughter as much organic food as possible and stay away from plastic as much as possible. Hormones in food and in certain plastic (# 3 and # 7) can accelerate puberty in girls. Make sure she only put BPA toys in her mouth.
Get a 2nd opinion, maybe try to see a pediatric endocrinologist. Not sure if a regukar MD is used to this type of problem, better see a specialist!