The City Ground boss has seven loan players at his disposal but is only allowed to name five of them in his 16 man squad.
That means that two from Dexter Blackstock, Paul Anderson, Joel Lynch, Isaiah Osbourne, Chris Gunter, Iain Turner and Gary McSheffrey will be forced to sit out the relegation six-pointer.
"We brought in some very good players but we are going to have major headaches when it comes to picking the side," Davies told his club's official website.
"We can only have five of the loan signings in at any one time so we are not in the ideal world yet.
"But it is my job to pick the players in each game who will give us the best chance of winning any particular match in the coming weeks."