The R's are currently 17th in the Premier League table following a string of poor results.
"We are so short at the moment, we are looking to improve the squad," said Warnock after his side's 1-1 draw at MK Dons in the FA Cup third round.
"They were exhausted in the dressing room, you can't give any more than that.
"A lot of teams would feel sorry for themselves, but we are in the hat."
Rangers travel to Newcastle United in the Premier League next Sunday.