A reader sends this 1994 article by Robert P. George and Jana V.T. Baldwin on parental rights. There is also a copy here.
He says that the NY case Alfonso v. Fernandez (1993) illustrates that the principles of parents rights (as laid out in the string of Supreme Court cases from Meyer and Prince to Troxel) are recognized as a matter of state law as well.
The US Supreme Court case Troxel v. Granville was in 2000, after the above article. It unanimously upheld parental rights as being guaranteed under the US Constitution.
Unfortunately, the family courts deny these fundamental parental rights on a regular basis.