Here is one of the projects that I did for one of my students for her first birthday.  She loves it completely and likes to carry it around by the nose in her mouth.  I started with rounds to make the nose and then worked in the backloops to create the depth.  If you are interested in the pattern let me know.  I designed it myself after looking at about 20 pig crochet patterns and not liking any enough.  i also crocheted the flower that is attached to the ear.