As your lion develops the feeding habit, this is exactly what he will do, he will nail anything that falls near him. My dwarf lions are so used to me feeding them, they'll hit whatever hits the surface of the water, even medicine tablets. They'll strike at all sorts of prepared foods now.
See if the lion will take the prepared food when you poke it in front of his mouth with a feeding stick. Or toss in some live food such as guppies and while he's gorging on them add a few krills as well.
wocka, in referece to eating its own young, the young lions have not developed their poison enough to where it would kill the mother, so I've read. I've never actually witnessed them as i've never tried breeding my dwarfs.