I used to be the only cat. 😼#luigithelioncat Furriends, Cat Mom here. How long does it take for Resident cat to get along with kitten? Luigi is super annoyed with Rocky, he doesn't want to play all the time and now always leaves when Rocky approaches. Rocky is a little pest and always tries to attack Luigi, bite him, wanting to play. We have plenty of room for both and vertical space. I don't want to stress poor Luigi. There is no aggression between them, with the exception of when Rocky attacks and Luigi swats at him and sometimes even hisses.