The Tykes secured a welcome 2-1 home win over Huddersfield on Saturday to climb out of the Championship dropzone and into 20th in the table, with four points from their opening five games.
The club currently have more than 30 players on professional contracts and Flitcroft admits some may go out on loan to get game time, while he is still trying to strengthen the squad in all areas.
One particular area is left-back with Scott Golbourne recently joining Wolves for an undisclosed fee, although youngster Reuben Noble-Lazarus did well in the role in the victory over the Terriers.
He told the Barnsley Chronicle: "I'm aware that I have a big squad at the moment.
"We have got to keep everyone playing games and it might be that we do what we did with Rob Edwards last season and give them some matches outside of the football club.
"We are looking for players in all positions but the left-back thing has been magnified by Scott Golbourne leaving.
"We won't panic. We have a list of about eight left-backs and left wing-backs. Reuben Noble-Lazarus stood up to the task against Huddersfield and he was excellent."