Well probably not much. The only thing I could think of at this point would be some SD they are the only thing that wouldn't fit in their mouths because they have an odd shape. Anything like giant danio or tiger barbs will be toast with time if not immediatly.
the ones I am getting are TINY about the size of a crayon if the dithers get eaten later that is fine I just want the fish to become comfortable in the tank first
for now I have black skirt tetras but SD and tinfoil barbs are good suggestions
I just don't like the price of the SD 5.99 for quarter sized at my lfs