The pair joined the Pars in August, although a back injury delayed McDonald’s debut until last month.
Despite both penning season-long agreements, the Tynecastle club have a break clause during the January transfer window and new Hearts manager Daniel Stendel has expressed a desire to see the youngsters in training with his squad.
Neither were involved as Dunfermline lost 1-0 to Ayr United, although Crawford insists he is still awaiting clarification from the Gorgie club.
He said: “I think it’s looking likely that the Hearts boys will be going back.
“Anthony missed out because he took a head knock on Thursday and I just felt it was right to shape up the bench the way I did, so Harry missed out.
“We’re just waiting on confirmation from Hearts but I think those two will be going back.”