I might be able to understand the food thing.
My DD takes food & eats it in her bed, then doesn't throw out the evidence or clean it up.
So when I go for snacks for lunch boxes their "missing."
Is it like that?

My issue is the hoarding of food Bec she doesn't want her siblings to have it & also the issue of clean up. This then turns into a "where can I hide stuff" game.

If it's just a snack I can understand that, but ours is getting into a bigger issue.

AFA the lying our DD sometimes doesn't even realize she's doing it Bec she does it so often.
She works with a therapist & we really do try to pick our battles with her. Yes I think they do try to push our boundaries & sometimes I get so tired of it I quit.
Yeah not that great on my part.

Wish you all the best!