Eli the Aussie's registered name is Ivanhoe's Thrill A Minute.

Kobie's registered name is city dog tag #01-0280, 'cause she's an adopted mutt!

Seriously, though, I believe that you can only register with the AKC if both parents of your dog were AKC registered. Just being purebred isn't enough. If you got Sadie from a lab breeder, check to see if there are papers she could give you to fill out. Eli's breeder gave us all the registration stuff, including his pedigree several generations back.

If you can register her, choose something really unique and catchy! You can still just call her Sadie anyway, but her paper name will be cool.