Why do some domestic cats lick biodegradable bags?

Cat licks a cornstarch bag

Nowadays, biodegradable plastic bags are made from PLA (polylactic acid) which is derived from cornstarch. These bags are compostable. They are environmentally friendly. They’ve been around for a long time, at least since 2006 as reported on the Smithsonian website. The manufacturing includes taking corn kernels which are milled. Dextrose is extracted from starch. …

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