Comment by pvg

Missing a cite to some pioneering work on this in the 30s by A.S.J. Tessimond [1]

Cats no less liquid than their shadows

Offer no angles to the wind.

They slip, diminished, neat through loopholes

Less than themselves; will not be pinned

[1]https://www.blueridgejournal.com/poems/asjt-cats.htm