The reason why there is no fine egg under the pigeon

Poor constitution: There is no fine egg under the pigeon, which is likely to be a physical problem. Unhealthy constitution causes impossible fertilization, or malnutrition, excessive obesity, etc., will affect reproduction.Older age: The breeding of pigeons has the best breeding period, and pigeons over 8 years old exceed this period, causing it to produce no fine eggs.Excessive reproduction: Pigeon breeding requires physical strength and energy, so breeding should not be too frequent, otherwise it will also produce no eggs.