Being raised on a ranch, in rancing / farming country, I have seen many small stock ponds dug and never be stocked. "Just so the cows can drink." Most are filled by runoff, no chance of fish swimming in to them. Yet they all end up with fish. Usually not a desirable species. Mostly green perch and what we call mudcat. Sometimes bass appear.
Nobody stocked them. There is no swimming from another pond. Leaves the only chance for it to happen to be birds. Or I heard once that fish eggs can evaporate from one pond and enter another pond via rain. Didnt believe that one.
So im left just supposing that the God who designed it all wanted fish in the ponds. So He devised a way for them to get there.
Then we could discuss how the pond weeds get transferred into new ponds!
