people feed snakes live mice all the time, and polys aren't too far off. Personally I wouldn't care for it, but like someone else said w/e works its your tank. I would be checking my water as mice have quite a bit of blood to give off in the water compared to any feeder and you can end up growing the wrong bacteria in your water.
If you're into the hunter/hunted thing I've heard of people giving bichirs small frogs, live shrimp.... salamanders, bugs....
If you're into the hunter/hunted thing I've heard of people giving bichirs small frogs, live shrimp.... salamanders, bugs....