I apologize if everyone else saw this article and I just somehow missed it, but, in the ongoing "Why is my pet suddenly sick" drama, here's a paper showing cat and dog(amongst other animal) transmission between animals and humans is probably more common than most people suspect.

https://www.sciencedirect.com/science/article/pii/S2772985023000546

If we can get over the numerous uses of the word "droplet" they do, at least, mention airborne transmission to cats:

"Cats are susceptible to airborne infection, and infected cats may transmit the virus to healthy cats living together through respiratory droplets or airborne routes"

I'm way, way beyond the belief that people would avoid COVID so that they don't kill their pets, but, to those still trying to avoid COVID, this is another reason to keep at it.