Skiploader and others have cautioned us as to the presence of thiaminase (an enzyme that breaks down thiamine and Vit B1 in frozen fish)in herring and other fish. Doug T. and I have used salt water fish in moderation over the years without known problems...

http://www.wetwebmedia.com/ca/volume_6/volume_6_1/thiaminase.htm

I thought this was a concise article on this often discussed yet little understood topic. Having fed my Drys, especially neonates, quite a few gold fish and minnows, blue gills and bass, I am concerned. However, like so many things, moderation in all things applies. Usually I just get them started feeding on fish, then quickly convert to a varied diet of birds, mammals and the occasional frog, fish, snake, etc. I am unaware of any deleterious effects to my Drys as a result of feeding a few fish. Variety is key. Also, North American sunfishes (Centrarchids) are said to be near free of thiaminase, so take a kid fishing and bring home some small bluegills, sunfish, fillet and feed if you need to get some stubborn Dry started...one of many ways apparently. Flat fish at the sea... Good luck, Vic

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