If you're trying to make good looking curves, the pen tool in Photoshop (and Illustrator) is hard to use if you are not used to Bezier curves. You'll get lots of pointy edges where you don't want them and the turns won't look "natural".
I can do it but it annoys me and is more labor intensive than it should be. I really prefer B-splines in Microsoft Expression. They don't make it any more, but they released the abandonware for free download:
What's good about it is that you can just choose a point to be "sharp" or "pointy", and it does most of the work for you. It's easy to adjust. So here on your moose or whatever:
The point not on the ear is pulling the curve, so the further you pull it the curve will move out. If you use Convert Anchor Point then you could turn that into a sharp point. Your curves can look smooth and sharp in the places you want.
It only exports to SVG. So I just use it as a tool for getting something roughed and then export and never load it back (no use in the .XPR format). Maybe you would find it helpful or not, I don't know.
Also obviously--if you are going for symmetry, only draw half of it!