This morning I finally figured out what has been causing the demise of my zucchini plants- vine borers! I noticed that the plants looked like they were rotting at the base with yellowish looking saw dust near it. A quick internet search revealed that vine borers may be the culprit. So, I cut the vines open at the bases and found what seemed like dozens of these grubby things inside. Ugh... my plants were finished! On the bright side, my chickens adored the vine borers. I also found some of the adult vine borer beetles on the plants and the chickens ate those as well. In fact, they gobbled them up like candy, which brings me to my question. Is it ok for the chickens to eat these? I assume that it is because they eat so many other bugs in my yard. However, I just want to make sure and I know that the many knowledgeable people here can give me some info on this.