I'm kind of on the side of Adam that the "water" in the dung doesn't count. So, "in theory" they got the requisite 10-pounds in the 5-pound sack. But then there's both in the "spirit of the myth" and then there's the idea of "all things being equal." The spirit of the myth is that you can't make a lot of something fit into something designed for much less. Which, well, you just can't no matter how much you try. In the "all things being equal" aspect the "wrung out" dung is different than the water-logged dung. Which is sort of what Jamie was getting at, the stuff with the less water in it is different than the stuff that was water logged. And between this myth and the one from a couple of weeks ago I find it sort of odd and bizarre you apparently can just buy a big bucket full of both lion feces and horse feces. I mean with the latter I get that the animals are raised somewhere and they do this a LOT so it's obviously being collected and disposed of. Just very odd that apparently you can get a hold of a 5-lb barrel of it. With lions they're not raised nearly as much as horses are so the only place you get a hold of it would be zoos which I still imagine would have a good "supply" of it but also it's just odd that apparently they can collect it and ship you a five-gallon barrel of it. With the lion dung it was integral part of the myth (no matter how silly the idea was. Between the "cure being worse than the disease" and that it's sort of odd to prevent animals from leaving waste where you don't want it by... surrounding that area with waste? For the horse-dung myth I suspect a comparable analogue could have been come up with, something with the same density as the dung and possibly not as water logged. In which case you couldn't compress it short of may squeezing a lot of air out of it.