In this club you can find alternative styles (skins) UDC.
Styles are kept on http://userstyles.org , where they are shared for free. There are many styles not only for UDC, but also for many other popular websites such as google, facebook and the like.
Use the sites' search box to find styles for Unitedcats and Uniteddogs.
The following is a mandatory disclaimer required by UDC admin:
"Users who decide to use the outside source have to be aware of what they are doing and that they are responsible. If there are problems with the UDC sites, UDC Admins cannot help users fix their problems with pictures, patting, etc. Therefore Admins and moderators take no responsibility for the activity done through userstyles.org."