Cool!! Thanks for folding it! The back legs should be swiveled forward, so that the top of the thigh lies flush with the dino's back. Then it gets rounded. It's not simple valley fold.
This funny photo should give a good picture of how to do the legs:
You should also thin the neck. And for the shape of the head, you just release those top layers from the head/neck crimp.
I'm really impressed!! I have a lot of difficulty folding that design.