6-20. 一旦雞群中出現啄毛及啄食癖的行為就很難排除，因此應盡可能預防。在大群飼養及密度高的情況下，當一隻雞隻遇到陌生的雞隻時，可能會藉由啄食去認識牠，而啄食可能會成為一種習慣。預防─讓雞隻有較大的空間或降低飼養密度。此外，啄食的行為是因為沒有正確的學習(如缺少母雞)，沒有直接的解決方案。 Once feather pecking and cannibalism happen in a flock, they are very difficult to eradicate. So prevention is key. In large groups and high occupancy situations, chickens always encounter strangers whom they peck to get to know. Pecking can become habitual. Prevention: lower occupancy or smaller flocks. Also: Pecking behaviour not learned properly (e.g absence of mother hen). No direct solution.