That gap in DVC's resin blanks

So I bought myself a small feline resin blank from DVC. As I started to put it together, I realized that it has a huge gap in between the top, and bottom jaw.


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I really don't know how I should go about covering it up. Some people use foam, and some just put fur over it.
I wouldn't mind putting foam over it, it's just that I've seen it on other heads, and you can see like...an awkward...weird, overhang.

As far as the fur method, I know that the fabric is supposed to fold in, and stuff, but the cheeks will look a bit flat. So I'm kinda stuck on what I should do.

Any ideas?

Thanks in advance! :D