Let me be the first to say this is probably a human in an elaborate cat suit, and not a real cat.
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Since I know the cat’s owner, it’s real. Cally had a skin condition at the time and the cone wasn’t keeping her from grooming overzealously. So my friend bought a baby onesie, modified it and kept it on Cally until the vet said the cat was well.
Sadly, Cally passed away last week at 17.