https://images.squarespace-cdn.com/content/v1/5475e650e4b0df...
https://images.squarespace-cdn.com/content/v1/5475e650e4b0df...
https://onpasture.com/2016/07/04/from-big-to-small-to-big-to...
All 3 parts of this are fascinating.
https://en.wikipedia.org/wiki/Droughtmaster
There is also the aptly named SQUARE MEATER which maintains the rectangular cow aesthetic
Doing the work myself, as you have, I find that many cows are rectangular. The author is unequipped to dispel me of this notion, if it's incorrect, but could have easily if he had addressed it preemptively by clearly stating his actual thesis. (Unrealism, not rectangleness). (And if he is correct)
This mirrors what happens with muscle cars, women’s handbags, JavaScript frameworks, and so many other things. The purpose remains ostensibly functional but the real driver is peer group status, to the point that function is totally compromised but the peer group loves it.
https://en.wikipedia.org/wiki/Shorthorn
One of the cows pictured.
While it might be possible to take a photo of a cow that turns out looking spherical (due to the lighting or angle), it is surely going to be harder?
Likewise, there is contrast between how highland cows are represented - from the front "the cows look like they’re posing for an album cover.". They do indeed look like a cow metal band could. They dont look rectangular, they look hairy.