After reading the article, I’m hoping Professor Kobayakawa will not be letting these mice loose on the world. I understand the practical application; how does fear work in mammals. I am not keen on mice having the chutzpah of Pixie & Dixie because if they’re not afraid of cats, they won’t think twice about messing with people.
The good news is that these “fearless” mice still froze up whenever a cat “spoke” or meowed (American spelling). At least Molly will fare well against them since she’s a conversationalist. Same goes for other cat yappers I know: Gabby, “Douf,” Torah and Celeste.