Randomize RSS feed display on sidebar?

I have a blog that’s pulling RSS feed entries from a different WordPress installation and displaying them on a sidebar. I’d like to randomize the entries in the RSS feed so that they don’t always display in the same order.

Here’s the current code that’s working, just not in random order:

<?php include_once(ABSPATH.WPINC.'/rss.php'); // path to include script

$feed = fetch_rss('FEED_URL_HERE'); // specify feed url
$items = array_slice($feed->items, 0, 10); // specify first and last item
?>

<?php if (!empty($items)) : ?>
<?php foreach ($items as $item) : ?>

<p><a href="<?php echo $item['link']; ?>"><?php echo $item['description']; ?></a></p>

<?php endforeach; ?>
<?php endif; ?>