Derby are considering signing another striker on loan as cover for injured duo Darren Bent and Chris Martin.
And top scorer Martin, who has 16 Championship goals this season, also has a hamstring injury and is likely to be out for another two weeks.
Coach Paul Simpson told BBC Radio Derby the Rams had been "making some calls".
He said: "We have talked about the possibility of bringing in cover but the options are very limited."
Bent, 30, has scored seven goals since joining on loan from Aston Villa in January.