WordPress has feed feature which is nice but nowadays mostly all of us use FeedBurner for its Advanced features and Statistics report. But you cannot track all the visitors unless they are redirected to FeedBurner.
Well you can use the below code in the functions.php to redirect to FeedBurner :
add_action('template_redirect', 'wpden_rss_redirect');
function wpden_rss_redirect() {
if ( is_feed() && !preg_match('/feedburner|feedvalidator/i', $_SERVER['HTTP_USER_AGENT'])){
header('Location: http://feeds.feedburner.com/wpden');
header('HTTP/1.1 302 Temporary Redirect');
}
}
Just in the above code replace wpden with your FeedBurner ID