Staff turnover is a concerning phenomenon whose consequences have been understudied, especially in child protection services. However, a high rate of staff turnover could have a negative impact on the affected clientele. This study aims to explore the link between staff turnover and the clinical progress of female adolescents in residential rehabilitation units in relation to the experience, expression, and regulation of anger as well as to psychological distress. Contrary to what was found in the literature, the results indicate that female adolescents exposed to a higher rate of staff turnover do not experience greater psychological distress over time and that their feelings of anger do not intensify over time. On the contrary, these diminish, probably due to a higher initial level of anger. The significant role played by covariables suggests many other variables account for adolescents’ clinical progress. Other studies are proposed to better understand the phenomenon of staff turnover and its consequences.