Zend Framework 1.6.2 Manual

Single Atom <entry> elements are also valid by themselves. Usually the URL for an entry is the feed's URL followed by /<entryId>, such as http://atom.example.com/feed/1, using the example URL we used above.

If you read a single entry, you will still have a Zend_Feed_Atom object, but it will automatically create an "anonymous" feed to contain the entry.

count() . ' entry.';

$entry = $feed->current();

Alternatively, you could instantiate the entry object directly if you know you are accessing an <entry>-only document:

title();