my friend's shiba inu is extremely good at puzzle toys and deeply obsessed with them and today she's been consumed by madness in one room she doesn't want to leave and we finally figured out it's because i sucked up some loose kibble in the little handheld vacuum, thus creating an unsolvable puzzle toy
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A variety of Hemiptera (also known as "True Bugs") from Memorie della Società entomologica italiana v.60 (1981).
Full text here.