If there is water in the ditch, feng shui is not good, because chickens will swim around in the ditch, and they may not come back after drowning, and there may be snakes in the water that will eat the chickens.
If there is no water in the ditch, Feng Shui is good, because you can use the ditch to make a nest for the chicken, and the chicken's poop nourishes the land, and the nutrients grown in the land can be pecked away by the chicken.
Feng Shui lies not in superstition, but in tangible benefits.