Damien wears one when he's outside sometimes it depends on how he's feeling that day. He's chipped and only goes outside with us on a harness so we didn't see the point in forcing him to wear it.

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Owned by Buster cairn terrier/australian cattle dog mix, Silas rough collie/alaskan malamute mix, Sophie Goldendoodle, Max Bouvier de Flandres, Damien moggie, Leo bunny, Thea syrian hamster and a tropical aquarium