"Regular intake of substantial amounts of food containing thiaminase could introduce enough thiaminase into the gut to break down the thiamine in food & render an animal thiamine-deficient.
Fish that contain Thiaminase:
Fathead minnow Pimephales promelas (the red rosy is a color morph of this fish!)
Gizzard Shad Dorosoma cepedianum
Spottail Shiner Notropis hudsonius
Buckeye shiner Notropis atherinoides"
these are all major parts of large mouth bass and many other N.A. game fishes diet. im not trying to argue or say that post is wrong or anything, just curious why bass can eat them but P's shouldnt. i just try to vary my fishes diet as much as possible. just like they say for us, everything in moderation. i feed insects, worms, 3 diff types of hikari, and occasional feeder neons and white clouds. i think mice would be fine as a part of the diet but not a staple.