Children - As enacted, specifies that a juvenile court proceeding may be commenced by the taking of a child into custody or the removal of custody from a parent or legal guardian; requires the juvenile court in a dependency and neglect proceeding to determine whether a parent, guardian, relative, or caregiver of the child cannot be excluded as a perpetrator of severe child abuse against the child; prohibits a juvenile court from returning a child victim of severe child abuse to the custody of a person who cannot be excluded as the perpetrator unless certain circumstances are met; makes various other changes. - Amends TCA Title 36, Chapter 1, Part 1; Title 37, Chapter 1, Part 1 and Title 37, Chapter 2, Part 4.