This is a pretty simple concept. There's a mod called Shinebug Reactor, which takes allthe materials it would take to ranch them, and feeds them into a machine which then gives everything you'd get from doing so- But at a substantial performance improvement, since it's simulating far fewer calculations then a dozen AI running all over the place.
I suggest basically the same thing for Dreckos, and possibly other ranched critters, just for the sake of the performance bonuses. Dreckos come to mind because balm lilies mean that they're a free food source that's less of a pain then Pacus, but if you wanted to make late-game farms equally as resource intensive but far less lag-inducing for other creatures, I'm here for it.