That indeed does sound strange....I had a similar encounter once when I played with two ferrets at my local Petland; they didn't know what to do and they could hardly play....They wouldn't even interact with each other or me.
I have heard it's usually the sign of some ferrets that come ferret mills. I'm not sure if it's true but to me it sounds plausible.
It may be low blood sugar, ferrets are prone to this. And when a ferret had low blood sugar they can become lazy and non-alert.
I also heard some Marshall ferrets can have this trait... I don't know if it is any disease, but I would check this with a vet just in case, for I am not a certified vet.
In the mean time, make play time more stimulating. Such as filling a box with sand, or hiding treats under little cups, or water to play in.
I'm sorry you and your ferrets are experiencing this, I would feel very distraught if this happened to me.
Do not feel bad if you have to take the ferrets back. For you are trying to find a pair of ferrets that works for your life style.
For the time being I wish you the best of times for you and your ferrets!
<message edited by Pets4Life101 on Sunday, December 28, 2014 12:22 PM>