Originally Posted by
Katallo
I actually tank them near to the worms on the outside (not in the centre where Alysrazor does her claw thingy), when the hatching enrages it grows in size and it's hitbox increases size too. If you're tanking in the right spot the hatchling will grow and suddenly the worm is in range for it to devour the worm (where as before enrage, it's out of range and ignores the worm), this way you're almost guranteed for the hatchling to instantly loose it's enrage effect.
It's something you'll notice and eventually get used to, and it often means standing in range of the worms flame breath thing, but with a bit of dancing about you can easily move past that without repositioning the hatchling at all.