Thanks, jorbin. is_feed is returning false. So now…how do I get a custom feed to return true in is_feed? Am I missing something obvious? I used this tutorial for setting up the feed: https://www.seodenver.com/custom-rss-feed-in-wordpress/
Basically this is added to the functions.php file and a custom template (test-feed-rss2.php) is made:
function do_feed_test() {
$cats = "5293,5294";
query_posts( array( 'cat' => $cats ) );
load_template( TEMPLATEPATH . '/test-feed-rss2.php' );
}
add_action('do_feed_test','do_feed_test',10,1);
Thanks again.