Hello. I live in a small apartment and so am training my cat on the leash so that she can enjoy the outside world. I have found it quite easy to get her comfortable with the harness and leash but she is very cautious once the front door opens. She is an outgoing type of cat, so I have been a bit surprised by this caution, particularly as she used to try and run out the door of my old flat - which was a motivation to get her trained on the leash. Any suggestions on what to do, or do I just have to be patient and keep trying? She is still young, by the way, about two years old.