Bill, I collect them in winter by drilling holes with the power auger in weed beds. When you pull the rotating auger out of the hole it floods the ice with thousands of them. I kept a number of them alive in a cooler for a few months, used an aquarium pump and airstone. I read somewhere that they require water with high calcium content to assist in molting and re-growth of shell.
I have an old fishless dugout on the farm I am living at now that is used for watering buffalo, it is loaded with scuds. I will drill some holes and pull up some vegetation, probably with scuds attached and post the photos.
