It is collected through the drain systems in floors of zoo's and wild life sanctuaries. Collecting the urine to sell adds to the money available to care for the animals.

Carefully.

I was wondering about the predator urine that comes in bottles for protecting gardens/livestock from animals by mimicking a predator marking their territory (or something like that). How do they "harvest" it?

I can't imagine a single humane way of doing it. All I can figure is that they have these predators in wire bottom cages or a cement bottom enclosure with a drain, but I'm not sure.

I haven't bought it out of fear of what I might be supporting, but again I don't know what happens.