We have had our kitten for five weeks and she is roughly 5.5 months old. She hadn't shown any interest in going outside and would sit at an open door and still stay in. Then yesterday she ventured out a few times, not for long and came back when called.
This morning she shot out the minute I opened the door and ran away from me twice before I was able to get her and bring her in.
We have two other cats who are 5-6 years old so it's a process of keeping certain doors open and shut to keep all cats happy but it feels like the older cats are missing out as they sometimes are confined to outside/utility room. There's a cat flap in there which is why the door is shut. Sometimes I put the kitten in our room when she's been naughty to give the older cats free rein.
So, when can she have freedom do you think? She was dropped off at the rescue place, stayed there a bit then came to us. We live on a close that has a few cats and dogs and sometimes idiots drive too fast. Our back garden is huge.