[leashless]

Eh. The problem pandemic-wise is the number of humans in slobbering distance of the animals: pets like cats are less of a problem (toxoplasmosis) because they're in less proximity with each-other. But all the unsanitary conditions add up to a gigantically increased chance of developing new pathogens when compared to most natural settings.

[throw9474]

Yes factory farms are basically a training ground for viruses to learn how to spread.

[leashless]

They look practically custom designed for this task.

The purpose of a system is what it does.