But that was the only high point in the first half for the Raiders as Ashley Graham, Glenn Hall (two), Antonio Winterstein and Ray Thompson all ran in tries for the Cowboys to take a 30-6 lead at the break.
Graham received the benefit of the doubt from video referee Pat Reynolds to equalise in the seventh minute, although he appeared to drop Bowen's wide cut-out pass after being nudged by Edrick Lee in the corner.
The Cowboys continued their strong form into the second half and punished the Raiders, who gave away multiple penalties for backchatting to the referees, and Bowen was again involved as Kane Linnett caught the Raiders outnumbered on the left edge in the 49th minute.
But the momentum began to swing back towards the Raiders, Dugan and Blake Ferguson grabbing tries in a 10-minute period to claw their way back into the game.
After long periods of dominating possession towards the end of the match, Cowboys second-rower Scott Bolton ran underneath the goalposts in the 80th minute to complete the rout.
Dugan's injury was not the only point of concern for the Raiders, who will be waiting on scans on second rower Joel Thompson, after he was brought off with a suspected fractured left hand during the first half.
-AAP