United face Aston Villa in the Carling Cup final on Sunday and Rooney has scored 11 goals in his last eight games for the Red Devils.
Ferguson said: “It has to be a consideration. The problem is he is desperate to play. He always is.”
The United boss may include youngsters midfielder Darron Gibson, Jonny Evans and Rafael in the starting line-up against Villa.
He said: “I’m thinking about the younger ones to give them a smell of it.
“But we want to win the cup having got there and got through the semis which were very emotional. We have got this opportunity of winning something.
“They only way you can enjoy Wembley is winning. It’s not a nice day when you lose.”