Frohring took a job on the loading dock at Telling-Belle Vernon Dairy, the largest dairy in Ohio. Eight months later, he was offered an opportunity to run fat tests in the Telling-Belle Vernon labs for Henry J. Gerstenberger, MD, the medical director of Babies Dispensary and Childrens Hospital (later, Rainbow Babies & Childrens Hospital), a pediatric hospital in Cleveland. Dr. Gerstenberger, with the assistance of Harold O. Ruh, MD, was investigating the possibility of developing a dairy formula to supplement or replace maternal milk for infants.