Linking objects and scripts help please

I think this is a simple problem for you wise ones out there.

I'm attempting to make a flying pet. I have created a body with a nice script that makes it follow me around. I have also created a simple flapping wing with some help from a door and script. Best of all, when I link the wing to the body, the wing flaps and the whole thing still follows me around. So far, so good. Here's the problem, when I link other pieces to the wing to make it more "wing like, the whole thing stays linked, but the added pieces no longer flap. How do I attach feathers to the wing and then the completed wing to the body and still have the entire wing parts flap like a wing?

I realize this may not be particular clear, but I'm hoping you can make sense of it.

Thanks in advance

Unfortunately, linking does not work like that. When a set of objects is linked to another set of objects, the parent object is the parent for all objects. You cannot make nested children as you would in normal modeling programs.