What can you do with an old freshwater shrimp pond?
We leveled the four ponds into two. They are now about 18" deep. I do better here with sunken beds, as its sandy and the sand and seeds just wash away. This one is a melon patch. I put a 6' chicken fence around it that's loose on the top as
@dave suggested so the chickens won't land on it. If they fly over anyway, I have a large piece of 40% shade cloth left I will pull over it. The (old!) cans are used to keep the seeds in place until they sprout, then I'll remove them and use a sprinkler. The frost cloth I'm hoping will keep the weeds out, and keep the melons out of the dirt.
The other two ponds are now my veggie garden. And I have wire around it too.