Another thing I have for Sophie Kate is a QR Code Collar Tag.
If she were to get lost and someone found her they can scan the QR code (more smart phones have a QR Code scan application, they are those black boxes with a white design on the inside). I got the tags at a website called Scan My Pet Please, they stay on her along with her regular tag at all times.
I have two tags, one for when she is home and one for when we are travelign (I change the profile for the travel on to include the local contact information also).
Scan MyPet Home QR Code Pet Tags | Scan My Pet Pls! Where lost pets are as good as found! | Specialty Dog Tags and Cat Tags | Online Pet Profile | Lost Pet Alert | Scan My Pet Please!