Meat Bird crossing?

[LTAY1946]

Certain types of fish (tilapia and catfish) have a very efficient feed to meat conversion ratio (2:1, or two pounds of feed gets converted into one pound of flesh) and I was thinking, that someone with a large pond could build floating cages with either chickens or ducks, and as the birds poop, and waste some of the feed, the fish below could benefit from that, creating an almost free second source of food for the property owner. That is something I have wanted to do for a while (the pond + fish + birds combo). Others have used pigs floating cages above the pond and the pig's waste fed the fish.

I think that it is tilapia that feed on pig manure. That was shown on the evening news some years ago. Tilapia ponds down hill from large pig barns. Manure flowing down hill to feed the fish.