What is the long hair in pigeon droppings?

"What happened to the long hair of pigeon droppings?" This problem can show that your pigeon house is humid, pigeons are most afraid of humid environment, and pigeons are also prone to illness. You should remove pigeon droppings first, then strengthen ventilation during the day, and never ventilate at night. Second, carry out disease prevention for pigeons, including pest control for pigeons.