Hi plum82. Before your lodger moved in, could your kitten go to every room? And if so, is your lodgers room one she visited more than others?
The reason i ask is this :- Being a kitten and sooo young, she is getting used to her environment and trying to mark her territory. She maybe 'taking' stuff out of the now 'inaccessible' room as a way of enforcing 'her' territory. If this is in anyway the case, let me know. Two ways to move forward exist and her being so young helps.

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Simba9952

Through a Cat's eye, all things belong to the Cat !