Wuff currently doesn't have a working banner, but their page is here.
Are you on the staff for a furry convention and would like to engage in a banner exchange with NordicFuzzCon? That's great! Then you'll need to send an e-mail to firstname.lastname@example.org with a direct link to your banner. That way the banner will be on your servers, and you can update it when needed. The banner size must be 200 x 80.
In return we ask that you put our banner on your website and link back to us. This is our banner:
Please use the following link: https://www.nordicfuzzcon.org/content/website/general/NFCBanner.gif