Thank you! It is an Ark Therapeutic necklace of a style I think they don't do any longer, but it is made to be a stimulant chewy toy for the masseter muscle. And also look like it is not, you know, a chewy toy. (Ark also has a Bite Saber for Star Wars kiddos.) They have always been extremely brave and just as much vulnerable. It's a lot like living with Rikki-Tikki-Tavi.