I would avoid baitfish as well. Many of them are treated just as poorly as goldfish. If they're wild caught they may have disease/parasites and if they are raised on farms the farms likely treat them like they would goldfish. Also, fatheads are commonly sold as baitfish, and though alright as treats they also have a high fat content and also contain thiamase (sp?). Generally speaking, coldwater/temperate fish aren't that good as feeder fish, mostly because they contain more fat. And before someone else mentions it, yes...I know LMB are also coldwater/temperate fish but in an aquarium setting their bodies process things differently so a diet high in fat should be avoided. Tropical fish would be best. Home raised livebearers (guppy, mollies, platies) or easy to raise cichlids (convicts) would work.