User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-74.240.150.112-20120626185348/@comment-58.7.139.55-20120627094544

Hungry Jho is most likely a Jho that is old and has been wounded in combat. Because it is old, it is not healing properly and the wound is causing it great pain. Thus causing it to go rogue.

So I reckon you're theory is pretty much right.