A thought occurs - perhaps it’s the mega farming that is the root of this problem and having some backyard chickens won’t really move the needle any closer to doom?
There is no needle - it only takes one case. While a megafarm may be a bigger vector, it can be quarantined, whereas everyone having backyard farms can not.
Now don't get me wrong, I'm not trying to directly compare the development of bacterial antibiotics resistance with the adaptation of viruses to be able to infect other kinds of hosts. Surely these disease vectors follow different developments.
It wouldn't surprise me though if intensive animal farming [3] has the capacity to exacerbate these problems, if only based on the high concentration of animals kept together and the generally poor health of these animals (poorly functioning immune systems, which is the whole reason for the overuse of antibiotics).
[1] https://en.wikipedia.org/wiki/Methicillin-resistant_Staphylo...
[2] https://en.wikipedia.org/wiki/Antibiotic_use_in_livestock