The problem is that when you open the pattern, the Head and Body pieces are right next to each other and they don’t look like they will fit - BUT THEY DO! It’s like sewing in a sleeve or any other curved piece. Cut out your pieces as noted on the pattern and prepare the Hedgehog following the instructions. Once you get to the point where your ready to attach the Head to the Body, with RST, pin the end of the Head and the Body together; now continue to pin the pieces .
IMPORTANT TIPS: Do not be misled: the Head for this pattern DOES fit the body, in spite of the appearance of the pattern page.