My wife and I have had a flock of chickens for several years. We had also been battling Japanese beetles. Last year, I noticed that my chickens were doing a great job with most of my yard pests, but not the Japanese beetles. So, I decided to train the chickens by handpicking beetle treats and feeding them to the birds. At first, they would just poke at the beetles, but they soon figured out they could eat them. In just a few weeks, they were gobbling up any beetles they found in the garden or yard.
Dover, New Hampshire
You can read much more about using chickens in the garden — for homemade fertilizer as well as pest control — at Chickens in the Garden: Eggs, Meat, Chicken Manure Fertilizer and More. — MOTHER EARTH NEWS