"We are not blessed with big, physical players. We tried to get more players like that last summer and in the transfer window and could not get them over the line.
"If Andy Johnson comes in for a bruising again I am sure he will meet fire with fire. We are not frightened of being competitive."
Dowie is confident Johnson (dead leg) will be fit to play but Mikele Leigertwood (foot) and Michael Hughes (groin) face fitness tests and Darren Powell (flu) and Nicola Ventola (leg) are out.
For Rovers, striker Paul Dickov (knee) is a doubt and Robbie Savage (groin) may only make the bench.