True, but also sets up the attitude that viciously backstabbing allies who might become threats later is smart, and if prefer we left that if all things to the skaven.
The We are probably what, less than a hundred hunters and three egglayers so far? Feeding them goats shouldn't be hard, but we may not be sufficiently advanced to make it an understood trade. Punching an offensive into a salient under Black Rock should allow predation because of lack of choke points, and a buffer for the dwarves with the underway behind them...
Overall though, we really need them to get into the mindset of silk=food and away from hunting as primary calorie source. Give them a stake in the success of K8P, make it so they have something to lose. Self-interest should do the rest.
Maybe turn the hunters lose in the Karag the trolls ate, to clean up scraps of greenskin ecosystem?