Actually, the Fox is easy to make.
Here is a pattern/template:
You see places where you need to make the folds.
It is easy to bend the tail down. But the neck will have some trouble. You need to make two folds on the neck. The first is to bend the head back fully along the back. The second –onward and upward –here he is the biggest difficulty. My kids beat the hell out of their foxes necks untill they managed this very fold.
Now bend the head down:
And decorate the head with two triangular ears:
I wish your papercraft foxes good luck!