I would argue that rabbit poop isn't that hot and can be added right to soil in small amounts. (Also make sure the rabbits in question are on an alfalfa diet. Some people actually feed rabbits cat food)
I would also add in the original post how unsustainable bat guano is and how ineffective it is compared to a million other sustainable sources.
"The beauty of bat caves is you got your bats... then you got this layer of shit.. but in between is a whole field of three-high wall-to-wall cockroaches. So every bat that's shit shit's on a cockroach. Then the cockroach eats that shit and shits out cockroach shit, which is what you're really making guano teas out of.
The other best part is every time we extract an entire cave of guano, 9 out of 10 manufacturers don't care how they get it or how it's done. They bash out the side of the cave walls, and take all the guano out with front end loaders.. leaving all those bats to never come home again and then they die because they don't have homes and they don't recolonize with other bats. they smash destroy one cave and then it's right on to the next one. If the product doesn't say bat conservancy and they aren't paying a ton of money to protect the bat conservancy in this world, they're part of the problem. We're all about to be in a lot of trouble between the bats and the bees which are two major parts of our ecosystem that keep us humans comfortable." ~Scott - Nectar for the Gods
He treats it as a drastically inferior supplement, and sarcastically says "it was the shit in 1980".
as seen here at 3:45