are you urban? I vote for some chickens, guineas or turkeys also. you don't have to keep them forever.
read a cool book recently that was a collection of writings from pioneer women in kansas. the grasshopper plague one wrote about was incredible. thye were eating the clothes off the line and such...... wow
well you could always harvest and eat them I was reading about native americans at my daughters request and the book mentioned that grasshopper "plagues" were considered a huge treat! I remember watching a nat. geog. show once where the children of a village went out to gather insects..mostly hoppers......to bring back and cook up as a treat. also years ago remember reading something about how insects would be the food of the future and had many characteristics making them an excellent food........except for the obvious problem of overcoming our prejudice to eating them. I don't think i could unless I was starving. maybe if I made a grasshopper pemmican type thing.