跌膘

dà duō shù de zhū zhǎng de yòu féi yòu zhuàng kě yǒu shǎo shù jǐ tóu yīn wèi shí yù bú zhèn ér diē biāo le

大多数的猪长得又肥又壮，可有少数几头因为食欲不振而跌膘了。

Most of the pigs are strong and fat, but a few have fallen away in flesh because of poor appetite.