Indoor cat mod?

Hey, uh, every time I go outside and see my cat waddling around and pouncing on stuff, I feel uncomfortable as I know it's bad for both the cat and the wildlife in real life (not to mention sometimes it hides in the grass I'm cutting and scares the heck outta me), so I'd like to know if there's a mod for indoor cats. TY!

Edit: knew I would get some flack for liking the indoor lifestyle more, but for installing a mod in the first place? This is a mod subreddit! What the heck?