Like switching between cannibalizing or dragging their child's corpse and carefully carrying or grooming it, suggesting that the mothers were experiencing conflicting impulses towards the bodies.
But self-defeating impulses have a pretty straightforward way of dying out, so the fact that species across the animal kingdom occasionally cannibalize their young suggests that it can sometimes be a successful strategy.
It's about as massive as Jupiter, but much more compact. It may be the remains of a carbon-rich white dwarf star. But it's been mostly cannibalized by its pulsar companion, and is now just a shadow of its former self.