2. High breeding density. There is a chicken farmer who raises over 1400 broiler chickens about 30 days old on the ground, occupying only 70 square meters of chicken coop area, with an average of over 20 chickens per square meter; Due to excessive density, the activity of chickens is restricted, the air is polluted, and the temperature increases, resulting in 40% of chickens pecking.

3. There are not enough buckets and water dispensers. There is a chicken farmer who raises 1500 broiler chickens over 25 days old, with only 11 feeding bins and 8 water dispensers in the chicken coop; Overcrowded feeding and untimely drinking by chickens can also lead to pecking.

4. Nutrient imbalance in feed. In a market economy, many chicken farmers add corn to their full price feed in order to save on breeding costs, and the proportion of corn added is not small, even exceeding 49.99%. In this way, the diet loses its full value, and the ratio of essential proteins, amino acids, trace elements, etc. for poultry is no longer reasonable. Therefore, more than 80% of chicken farmers who peck their feathers due to these reasons.