The sprightly attacker suffered a metatarsal fracture in training on Thursday, and will be unavailable for Neil Warnock to select until December.
“The consultant we have spoken to has advised us that the best way to deal with it is to put a pin though it,” club physio Nigel Cox told the side’s official website.
“DJ will have surgery and will then be placed in an aircast boot for three weeks which will immobilise the foot.
“The benefit of that is it means there can be some partial weight-bearing so DJ can put weight on the foot from day one.”
“But for an injury of this nature you are looking at a timescale of six-to-eight weeks before the player can resume full training,” he stated.
The news will be a blow for the Loftus Road outfit, who have the joint lowest scoring record in the division, only hitting the back of the net six times in eight fixtures.
The 29-year-old joined the newly promoted side from Blackpool in August, and has scored one goal since his move to London.
By Gareth McKnight