Today, Artemis manages to nudge a tiny gap open in the kickboard of my fitted kitchen. She then flowed through the resulting tiny gap before getting completely stuck, I wondered where she was then found myself hearing despairing mews from behind the backs of cupboards.
Once I realized where she had gotten to I removed paneling to let her out but of course her sister then had to investigate the exciting new territory, her hugely fluffy long haired sister. By the time I had both of them lured out I found myself with a pair of extremely dusty and excited 8 month old kittens romping around.
Gah.
Edit: She did it again today, it turns out it was not the kickboard, she was climbing atop the fridge then falling down behind it. I had to unscrew a ventilation grill to let her out after I heard piteous cries then saw her nose through it. I have covered the top with cardboard but will need to work out a less airflow blocking solution.