Now, if the state gets its way, hundreds of the girls could be put in foster homes, in what could be a wrenching cultural adjustment that may require intensive counseling.
"What they are up against is having to deprogram an entire community," said Margaret Cooke, who left the sect with seven of her eight children near the end of 1994. The children "are so naive and they have been sheltered to the point that they don't even trust their own judgment."
Marleigh Meisner, a spokeswoman for the state Children's Protective Services, said the agency is working with mental health and other experts to make the children's transition as easy as possible.
Meanwhile, in court papers unsealed Friday, authorities said they found a "cyanide poisoning document" in their search of the compound in the town of Eldorado. But the 80-page list of items seized gave no further explanation.
Texas Department of Public Safety spokeswoman Tela Mange said the document consisted of pages torn out of a first-aid book on how to treat cyanide poisoning. But she said she didn't know why the sect would have such information on hand.
Child welfare officials seized more than 400 children, most of them girls, in the raid on the compound of the Fundamentalist Church of Jesus Christ of Latter Day Saints, saying the youngsters were in danger of physical, emotional and sexual abuse.
The renegade Mormon splinter group requires girls at puberty to enter into polygamous marriages with much older men and produce children, authorities say. The sect also teaches children to fear the outside world, including the very authorities who removed them until a court hearing Thursday that will help determine their future.
"You're taught to fear everyone and everything," said Cooke, herself a 16-year-old bride.
The state is now scrambling to find shelter for the women and children, reports CBS News correspondent Hari Sreenivasan.
Most of the children are the offspring of the faith's inner circle - including its now-imprisoned prophet, Warren Jeffs - who were born since construction began on the compound in 2003, or were hand-selected by Jeffs to come to the enclave, which the sect regards as part of Zion on Earth
In 2003 and 2004, Jeffs, the spiritual leader of an estimated 6,000 followers in two adjoining towns along the Utah-Arizona line, plucked children under the age of 6 to bring to Texas without their parents, former sect member Isaac Wyler said.
"Over age 6 they were too contaminated for the world to be of use to God," said Wyler, who still lives in Colorado City, Ariz., and has 39 siblings. "He picked the ones that would be the most obedient, the ones that would be qualified to go to Zion."
Authorities raided the Eldorado ranch April 3 after a girl from the clan made a whispered telephone call for help to a family violence shelter. The 16-year-old, who indicated she was a few weeks' pregnant, said her 50-year-old husband beat and raped her. The girl has not yet been identified among the 416 children and may not even be among them.
In the call, the girl said that sect members warned her that if she ever left, outsiders would hurt her and force her to cut her hair, wear makeup and have sex with many men.
Most of the sect's children have never attended public schools or worn modern clothing. The girls wear long, pioneer-style dresses and keep their long hair pinned up in braids.
In their search of the compound, police uncovered dozens of journals and other documents that contain birth, marriage and other genealogical records. That may help social workers match children with their parents.
According to tax documents, the ranch paid more than $400,000 in taxes in 2006, reports Sreenivasan. In addition to a cement plant and cheese factory, the hundreds of women and children could be another source of income.
The hearing next Thursday will determine whether the state gets full custody of the children or whether they can return to the compound in Eldorado.