Skipper Danny Collins had to be substituted against Sheffield Wednesday on Saturday after a clash with Jermaine Johnson left him with blurred vision.
Greg Halford serves the second match of his three-game ban while Davies says Daniel Ayala and Sam Hutchinson are at least another week away from full fitness.
Jamaal Lascelles replaced Collins on the day and could start alongside Elliott Ward if none of the other players recover in time.
Striker Darius Henderson remains doubtful having missed the trip to Hillsborough so Simon Cox and Dexter Blackstock will continue in attack.
Forest currently lie four points off sixth place and are unbeaten in the four games since Davies returned in the hotseat.