Dunn was rested for Tuesday's loss at Ipswich, whilst Chris Taylor was also absent, but the pair could be involved against Harry Redknapp's side.
Also hoping to make the weekend match is defender Grant Hanley. The Scottish international came off after an hour at Portman Road with an arm injury, but he should be okay for Saturday.
Speaking on Thursday afternoon, boss Gary Bowyer said: "Chris Taylor will be back, he missed Tuesday's game for personal reasons, so we'll welcome him back into the squad.
"He was excellent last week against Leeds and got the man-of-the-match and rightly so, we are hoping that he can come back in and pick up from where he left off.
"With Dunny, we missed his experience, his creativity and his enthusiasm. We had to be sensible with him after his knock against Leeds.
"Grant got a bang and trapped a nerve, so he couldn't feel his arm so had to come off. He's recovered well as time has progressed so hopefully we'll get him out on Saturday."
Todd Kane will miss the Loftus Road clash through suspension. The on-loan Chelsea defender picked up his 5th yellow card on Tuesday night and sits out the Queens Park Rangers match.
That could present Adam Henley with a chance of his first senior appearance this season, although the manager has hinted of a change in formation as well as personnel.
"Obviously we don't like losing anybody through suspension, we've had our fair share this year with the sending offs and now we've got Todd out after five bookings," added Bowyer.
"The quality of the squad is that obviously we've got somebody like Adam Henley who can play there, and there are one or two others that can play there, and it might not necessarily be a back four.
"We've got experienced people on the staff and if you look at the manner in which we've been shipping goals away from home it is something that you have to be open minded to and not ignore the possibility that as well as a change of personnel, there can be a change of system.
"We have a clear idea of what we are going to play and what we are going to put out."
Supporters who haven't yet purchased their tickets for Saturday's away match at Queens Park Rangers can now do so on the day of the game.
Fans have until 4pm Friday to obtain their tickets for the Loftus Road clash from Ewood Park, otherwise it is pay on the turnstiles - cash only.
Some 750 of the 1000 ticket allocation has so far been sold, with all the silver priced tickets being snapped up expect for the family area.
Ticket prices are £30.00 Adults, £20.00 Seniors (over 60), £20.00 Young Adult 16-21 (Proof of Age Required), £15.00 Under 16. Under-8s go free with an Adult ticket in the family area.
For further information call the ticket office on 0871 222 1444.