Givet missed Rovers' last two outings with a hamstring injury sustained during last month's defeat at Watford but is now back in full training.
Club stalwart Dunn required stitches after sustaining a gash to his ankle during the recent victory over Millwall which ruled him out of last weekend's 1-1 draw with Crystal Palace - a result that effectively ended Rovers' relegation fears.
"Gael is back, he has recovered from his hamstring (injury) so that is one extra for us," caretaker manager Gary Bowyer confirmed on the club's official website.
"We've one or two who will be assessed on Friday morning. One of those is Dunny.
"He's been magnificent for us in the last couple of games. He has shown how much this club means to him."
Goalkeepers Paul Robinson (back/lung) and Jake Kean are long-term absentees alongside right-back Adam Henley (hamstring) and Dickson Etuhu (knee), while striker Leon Best completes a three-match suspension.