I have the acreage needed to easily support about a dozen free-range chickens. In addition to locations that support more insects naturally, compost heaps can help a lot. This time of year we are even using lights at night to attract flying insects to pens holding chicks and juveniles. At the barn I have three largish tanks that produce more duckweed than 10 chickens can eat for almost 6 months of the year. I'm thinking about putting out pheromones for Japanese Beetles to bring them into range during the day.