Early indictations show that he will miss the game on Saturday, leaving Danny Allsopp and Tony Hackworth to battle it out to decicde who partners the in form Mark Stallard in attack.
Fenton picked up a hip injury in the 2-2 draw at Tranmere just before Christmas, which saw him withdrawn from the game early in the 2nd half, and he like Heffernan, has not been seen since.
He did take part in the pre-match warm up with Barnsley on Boxing Day, before picking up a thigh injury. With fellow defender Ian Richardson suspended for the clash with Stockport, Notts will hope the influencial defender can return to the starting 11 at the weekend.