How the heck did my dog's name wind up in my contact list? Apparently this was from tagging pictures in Picasa and now if I try to delete anything from Google C

How the heck did my dog's name wind up in my contact list? Apparently this was from tagging pictures in Picasa and now if I try to delete anything from Google Contacts it warns me that they'll also be deleted from Picasa etc. Geez, maybe I want my dog tagged in Picasa but I don't necessarily need to keep her in my contact list. I can't remember the last time I phoned her or sent her an email.