These creatures were already very adaptive.
Eating demon meat naturally meant an evolutionary change.
Those that crawled before suddenly sprang out wings from their bodies.
Thkse that had wings already, grew better ones and even deadlier weapons.
Lenny turned to Insect-B.
"Do not be bothered father. I made sure to already give particular commands they cannot disobey as a part of their fundamental genetic make up."
Lenny nodded, "good! Then let them go into town. Let them kill everything that lives or breaths, and if there is any demon they cannot bring down, forward such information to me. I'll take care of the bastard myself."
Insect-B nodded as she waved her hands.