Dunwoody signed a professional deal with the Potters in the summer.
The 19-year-old captained the under-18s to the FA Youth Cup semi-finals last year and recently earned his first cap for Northern Ireland at under-21 level – marking an impressive last twelve months for the midfielder.
He experienced a brief loan spell with Evo-Stik League South outfit Leek Town last term before returning to the bet365 Stadium.
Dunwoody committed his future to the Potters after a promising 2016/17 season and is hoping to maintain his development with regular appearances for the under-23 side and forays into the first-team environment.