MY LFS also carries a large selection of 4 and 2 legged critter supplies. On a recent visit I ran across a new line of raw, freeze-dried dog and cat treats http://www.vitalessentialsraw.com. One of the treats is freeze-dried minnows, US sourced and processed. While I don't have any fish of a size to consume such food, I know many here do, and I thought I'd pass along the information. This would seem like a safe, minimal mess source of "feeders". I checked and Amazon carries them, although they are higher than what I'd pay in my LFS.