I need to know my cats breed, He is 23 years old.....more in description?

He still walks fine,has some teeth,one eye,gets up and down stairs fine,stands up for himself....and Im 17, and i got him for a present for my 2nd birthday, and i love him so very much, i have already shot 3 coons to protect him.....I know his time is coming to an end, and i want to know the breed of him, i will try and provide a link with a picture of him, his name is "Kitty" thats what i started calling him when i was younger and it just stuck. Thanks alot