Healy has failed to hold down a regular first-team spot at Fulham since his summer move from United and has just 12 starts to his name to date.
Brian McBride has now made a comeback from a knee injury so Fulham boss Roy Hodgson has more options up front as he bids to get the Cottagers to Premier League safety.
The Owls are struggling to stay out of the bottom three in the Championship and boss Brian Laws is hoping to add a forward to his squad at Hillsborough.