Steve M,
There are several "natural" ways for fish to get into a pond, and all have been mentioned. The odds of fish getting into a pond by some of the methods are slim, and some are very slim. Yet people do hit lotteries and jackpots on the slot machines. Think of it as pulling a slot machine lever 5-10 times a day for 5 years. Sooner or later, something will happen. It may take 20 years, 10 years, or less than 5 years, but it will happen. Nature (and man!)always finds a way!
