These things usually are quite cute, but you didn't have any white or other colored yarn for the belly?

While looking around at one point for stuffed animal patterns, one of the sites I was browsing though had knitting stuff in it as well as plushs. The first link is just the generic search of the site I bookmarked, not a link to any specific project.

http://www.craftster.org/forum/index.php?action=tags;sa=showtopics;tag=fox

This one seems to have a pattern for making a fox amigurumi, and a picture.

http://sweetncutecreations.tumblr.com/post/19887550538/fox-pattern

There's probably more stuff out there, but these were some I remembered having.