I quarantined my new kitties in a separate room on another level of the house in a room closed off from the others. Made sure hands were washed and I changed my clothes after interacting with the new kitty. After threat of disease was passed we began " scent exchange" and gradual introduction to the other cats, that's why they get on well and do not fight. Most my cats were strays at the time they came to me, so no telling what they might have picked up until I had them completely vetted and vaccinated.So you would quarantine a cat being brought in from another state? Where would you do that? You suggest you would quarantine a cow or sheep as well, where would you do that?
Similar situation to a cow or horse or sheep, separation from the herd. Screening for blood Bourne disease prior to cow even coming to farm. They usually have a stall that can be sanitized, hard or rubber flooring with drainage.
Hawaii has a strict 6 month quarantine on all cats and dogs entering the state as Hawaii does not have rabies, even for vaccinated animals, they must quarantine.
Quarantine is not a forgein concept in animal husbandry, but just like with fish keeping, people will forego it. It can have costly consequences, especially if animals are kept in high populations. Feline leukemia/panleukopenia outbreaks in cats can mean death of the whole population housed together.