We got her when she was around 8 weeks old and started harness training her immediately but I’m still on the fence when it comes to if all cats can be leash trained or not. A big thing you’ll see in the film is all of us admitting this is just who our cats are. There’s one guy in the movie that adopted his cat later on and the cat took to the outdoors instantly. Starting young helps but the cats personality is definitely a huge factor