Removing “Powered By” text in footer

In the page I linked, at the bottom it says Family Pet Hospital 2015 on the left and Powered by DadTriad on the right. I wish to edit that “DadTriad” text and the copyright text.

This web dev is not running this site anymore and we want to dissociate ourselves from him and his “services”

I have checked the WordPress editor and went to the footer.php file and I couldn’t find that line of text or the copyright line of text. I have googled and searched everywhere in the editor, but couldn’t find a solution. Maybe this web dev decided to hide his name on the file so we couldn’t remove it since its free advertising? I’m not sure.

The page I need help with: [log in to see the link]