Now correct me if I'm wrong but in season 4 episode 2 when the sickness started to spread through the prison Rick and the group go in there to kill the walkers that were in there when they took one of the little girls to put her in one of the cells. They picked her up kind of and when they do if you listen closely you can hear her say that she's scared or something of the zombies. Now watch this episode and play that part again and again, listen very closely to the little girl to hear her.