Prevent Google Feed API from using cached feed

I am using the Google Feed JSAPI to read/parse a feed. The problem is, when the feed changes, the previous entries become invalid (links and images don't work) so I cannot load a cached version of the feed. I thought there would be an option when loading the feed to not use the cached version but I don't see one. My solution is to do add in a variable (t) to the end of the feed url so it is "unique" but this seems hacky (but it works). Anyone know of a better way to do it?

    function onLoad() {      // Create a feed instance that will grab feed feed.      var feed = new google.feeds.Feed(feedLocation+"&t="+new Date().getTime());      // Request the results in XML (so that we can parse out all the info      feed.setResultFormat(google.feeds.Feed.XML_FORMAT);      //must set this - if you don't, it defaults to 4      feed.setNumEntries(50);      // Calling load sends the request off.  It requires a callback function.      feed.load(feedLoaded);    }