Social network intervention aimed at bolstering the informal supports of high risk families is recognized as a common element of community-based, family-focused practice models, such as intensive family preservation services (IFPS), multisystemic therapy (MST), and the wraparound process. The empirical research basis for these practice models is examined, with an eye toward discerning the extent to which network intervention is identified as a critical component of comprehensive service. Results reveal that few studies make clear the degree to which treatment adhered to a focus on natural network enhancement or the development of informal resources. Those that did, suggest that relatively few families received this form of ecologically-oriented intervention. Consequently, this body of practice research offers insufficient evidence of the benefits or limitations associated with network facilitation with multi-need families. Explanations for these findings are explored and directions for future research are recommended.