I read
this article about some scientists who have created mice with no fear of cats. The scientists from The Tokyo University developed the mice by shutting down receptors in their brain that process information about smells. Usually the receptors would induce panic when a mouse smells a cat but with them shut down the mouse loses its fear. That’s all very well but I thought mice were meant to be scared of cats. The cat used in this experiment shows no interest in eating the mouse but my cats would hunt it whether it showed fear or not.