A quilt back?

I thought I would use Wednesdays to work on WIPS.  So yesterday I got out my Bust Yo Scraps quilt that I am making for my support group charity (Downs Syndrome Support Network).  I really wanted to use the little zoo animals die I recently purchased.  Here's how the back looks.  I think it's cute!

BUT, I really don't think this fabric matches the quilt top...  I think I'll piece a different back for the Bust Yo Scraps quilt and use this for something else.  What do you think?  There's too much black in the back and none in the quilt top.

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