Pets.be is rehoming abandoned animals in Belgian animal shelters since 2002. We recently migrated to Drupal and added social networking features. Users can now create a profile for their dog or cat and connect with each other to share photos and videos. We're actually quite proud of our theme. The site is available in dutch, french and english, though most of the content itself is in dutch.
Fun fact: Drupal founder Dries Buytaert's wife is a big fan of Pets.be ( source)