What do you mean by reliable sourse Kevin? Pet Smart etc? how about going down to the river and catching minnows we have alot but I haven't caught any for mine in a couple of years.
If you have a fresh water source near you I would defiantly vote catching from there over petsmart. Every petsmart I've ever been too has a bunch of dead fish in the tank as well as obvious signs of parasites. If you have a local fish store that would be your better bet. Many of them keep feeder fish on hand for Cichlids and they are usually kept in much better conditions and show no signs of parasites. Another option is to breed your own. Breeding livebearers is very very easy to do. This is a much more controlled situation and you can always have a steady supply on hand.
Very nice do your ducks stay on the pond all night? don't you worry about preds?
Added the lights yesterday ... ahhhh
Okay good, just made me nervous when i saw them still on the pond and it was dark, your setting is beautiful, I know you all are enjoying it.
Hens go broody when you don’t want them to… and won’t go broody when you do. 
