Little Prince valiant

Our indoor - outdoor cat became an inside cat after a $750 vet bill.
He was young and liked to fight, but he was not good at it, he was constantly comming home after a few days all beat up, fur missing etc.
One day he came home with his eye hanging out, vet bill, eye now missing along with his balls.
He is now kept indoors.
We had a mouse in our house, wife was complaining the cat could not catch the mouse, I just laughed and said take his collar off that has a bell at it, at least give the one eye cat a chance.
He caught the mouse within two evenings after that.
No mice in the house since then, just leave his bell off.