GW, if you're talking about quick, mass stocking, I totally agree. It would take months to many years to stock a void pond by accidentally dropping fish, depending on the proximity of the void pond to stocked waters. If the void pond is isolated enough, it may never be stocked, even by 1 lonely minnow.
I have observed accidental dropping of fish, and I have observed deliberate dropping of fish. The deliberate dropping incidents were "muggings". A bird catches a fish, and gets mugged by another bird. To avoid injury and to lighten itself, the fish carrying bird simply drops the fish.
I agree on the egg thing. While certainly possible, it's not likely. I'm sure it happens somewhere in the world several time a day, but only because there are millions of birds, fish, and ponds in existence.
