God's zoo is big...

If you want a real optical mouse, then don't hesitate!

You'll need:
1 mouse (travel size, optical, USB, and stuff)
1 mouse (from the field, from house, from the pet shop)
1 stomach (the calm kind)
butcher, and/or anatomist skills

If you're ready, then go, you can find everything here...
(perhaps you should't want this kind of thing)