I have a friend who owned a trapping lure business and sold a lot of fox urine to trappers, and then during the 1980's fox urine came into use as a "cover" scent and he made a killing selling fox urine to deer hunters. I learned that he had signed on to supply a huge amount of deer urine to Tink's. I asked him where he was getting all the deer urine and he wouldn't say a thing about it. One night over a campfire he'd been drinking a little and loosened up a bit about it. I learned that he had a source for deer urine from a breeder he knew, but they could only supply a small amount of what Tink's had agree to buy. So he was getting cow urine from a farmer to add to it. If the barrel wasn't full when it was time for the Tink's guy to come and pick it up, he would top it off with the garden hose.
This was back in the mid-80s I believe. Is the deer urine busines a racket? Yes it is. THis may be an extreme example, but then again, who knows?
One thing that always baffled me. There was a period of about 6-8 years where coon urine was all the rage. Suddenly all of the shelves of the stores, including Wal-Mart, were stocked with Coon urine. Just exactly where did all this coon urine come from? I guarantee you it didn't come from coons.
People often do not think before they buy this stuff.