While searching for a way to do this, I found Find out the RSS feed for an iTunes podcast. The guy created a bookmarklet to reveal the true RSS podcast URL/content feed, when you are on an iTunes podcast page.
javascript:(function(){var%20newScript=document.createElement('script');newScript.src='https://cdn.rawgit.com/djm/uncover-itunes-rss-bookmarklet/master/bookmarklet.js';document.body.appendChild(newScript);})();
It should be noted that the bookmarklet redirects to https://cdn.rawgit.com/djm/uncover-itunes-rss-bookmarklet/master/bookmarklet.js. It looks innocuous enough but the script could be changed at any time, including by a malicious hacker, so be forewarned.
He did publish it on GitHub––djm/uncover-itunes-rss-bookmarklet: Javascript bookmarklet to reveal actual RSS URL on a iTunes podcast page.
It works. e.g., when on https://itunes.apple.com/us/podcast/burnt-toast/id969524107?mt=2, the bookmarklet gave me http://feeds.feedburner.com/food52burnttoast. This opened perfectly in my feed reader.