i make my snello with butternut squash and i crush up NLS into it (yep, my finkids are spoiled!). i don't have any briggs these days but due to a huge last batch of snello i've been feeding what's left to my fish. i guess the ramshorns get a bite or two, lol. the cories go nuts! they snuffle in it until they are practically covered! silly cories.......
meaty foods in there would work wonderfully i think. but no mammal meat. fish aren't meant to eat it.
try (from the San Fransisco Bay brand-frozen): bloodworms, spirulina brine shrimp, emerald entree. my fish go insane for these ones, and i've found them to be good quality.
put a touch of garlic juice in there too, skip the calcium, and add crushed up dry fish food as well. like i said, NLS works well, and it's a great quality pellet.