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Message definition (Poultry ) Domestic geese are much larger than their wild counterparts and tend to have thick necks, an upright posture, and large bodies with broad rear ends. The greylag-derived birds are large and fleshy and used for meat, while the Chinese geese have smaller frames and are mainly used for egg production. The fine down of both is valued for use in pillows and padded garments. They forage on grass and weeds, supplementing this with small invertebrates, and one of the attractions of rearing geese is their ability to grow and thrive on a grass-based system. They are very gregarious and have good memories and can be allowed to roam widely in the knowledge that they will return home by dusk. The Chinese goose is more aggressive and noisy than other geese and can be used as a guard animal to warn of intruders. The flesh of meat geese is dark-coloured and high in protein, but they deposit fat subcutaneously, although this fat contains mostly [[Monounsaturated fats|monounsaturated fatty acids]]. The birds are killed either around 10 or about 24 weeks. Between these ages, problems with dressing the carcase occur because of the presence of developing [[pin feather]]s.
家禽ガチョウは野生の同属種よりはるかに大型で、太い首、直立姿勢、後躯の幅広い大きな体をもつ。ハイイロガン由来の鳥は大型で肉用に適し、シナガチョウは体格が小さく主として採卵に用いられる。両系統の細かな綿羽は枕や中綿衣料に重宝される。草や雑草を採食し、これを小型無脊椎動物で補うため、草地中心の飼養体系で成長しやすい点が飼育の魅力である。非常に群居性が強く記憶力に優れ、日没までに帰巣するため、広範な放し飼いが可能である。シナガチョウは他のガチョウより攻撃的で騒々しく、侵入者の警戒を知らせる番鳥として用いられることがある。肉用ガチョウの肉は暗色でタンパク質に富むが、皮下に脂肪を蓄える。ただしこの脂肪は主に一価不飽和脂肪酸 である。屠殺はおおむね生後約10週または約24週で行われるが、この間は生え替わりつつある筆毛 のため、羽毛処理に支障が生じる。