I can see why you might want to reduce the cost of rearing spined soldier bugs, for instance as a predator to control pest insects. 

Dogs are descendent's of wolves and yet wolves cannot survive on the lower protein diets that dogs are able to eat. It is thought be part of the domestication process. I am not sure whether I would classify it as evolution of dogs after they and humans entered into a sort of symbiotic relationship, or as artificial selection. Maybe you can Google around and find something on this. The relation between dogs and humans has been going on for a very long time. Indeed you can find documentaries about primates keeping dogs as pets in some dump in India. I think there might also be a documentary about wild canines and baboons forming joint packs. Again resort to Google for the documentaries, and to Google Scholar for the technical stuff. But, if our dogs become sufficiently vegetarian  could they become pasts, like the American Opossum? 

Many predatory Hemiptera  occasionally sip plant juices. And various viruses infect many different insects. Viruses also transduce genes (move them about), this may even be aiding evolution by providing an added source of gene diversity. So, if you find and use such a gene transduced from another plant eating Pentatomidae, your product might become less predatory and even could become a new pest.