Which is why I said things like; there are multiple possible chemicals as the main requirement is that it reduces blood clotting. Efficiency and feasibility are definitely primary concerns though.
Funny enough, i don't know if you know this, but a lot of commercial rat poisoning is actually just Vit D now. They stopped using warfarin for safety concerns.
RIV aside, im kinda surprised they havent come up with some idea. like have they even tried anything at all?
There is no reason to...or I should say, its not worth the money it would take to eradicate rats on such a large scale to the higher ups.
For instance,
Australia wants to inject their carp with herpes.
This shyt happens more often than you think
Not often enough in NewYork apparently
I'm not a virologist, or toxicologist...but i do have more training than most in areas. Here's my educated opinion on why rats is harder than fish to deal with. Rats have a very similar biology to humans. Thus, using that method to kill them would likely result in us getting sick too at some point. With fish, its easier to develop something that wouldn't cross over because their physiology is so different.