Indeed and truly.  Digbie is taking some risks here, but he's also leveraging his dominant position.  The change in Rags Nar's group could indicate a desire to look stronger as well as a wish to have protection when taking a risk.  This could be the Broke Tower Gobs' true kill party.  If they can be intimidated and controlled, then Digbie will have gained a lot of power that he doesn't know how to use.  But, the releasing of the animal would be less effective than if he had a taming skill and could tame it properly.  That would secure the other gobs obedience... for awhile at least.