""Since it has been determined that this package weighs less than a human head (with or without the neck?) then I would guess that it isn't a turkey""

ummm, can't say I actually weighed a human head lately??? Or, ever????

Butttt,

That does not rule out turkey meat (deli type, or sliced turkey breast)- or even a really small turkey, let's say a "young un", grown specifically for the single man on a light diet:)