What causes foaming at the mouth?
Foaming at the mouth is a sign of sham chewing (stereotypical behaviour). The sow isn't (or wasn't) feeling well. Stereotypical behaviour is comforting to the animals due to the release of morphine-like substances.Once they start, they keep doing it.If many sows in the pen are sham chewing,look for the cause. Does the feed provide a satisfied feeling? Are they waiting to be fed at the feeding station? Is something wrong with the climate? Are the sows unable to flee from a dominant sow? Do they have enough lying space?
這是老外對(duì)這種“空嚼”現(xiàn)象的看法。翻譯如下：
什么原來引起嘴里這么多的泡沫呢？
嘴里泡沫是空嚼的特征（模式化機(jī)械的行為）。母豬感覺不好。這種機(jī)械的行為的產(chǎn)生是因?yàn)閱岱葮游镔|(zhì)在體內(nèi)釋放的結(jié)果。一旦開始，行為就持續(xù)下去。如果有一頭母豬發(fā)生空嚼現(xiàn)象，就必須要找原因，是不是飼料不能滿足？是不是她們?cè)诘戎沽?？是不是氣候影響的？是不是母豬沒辦法逃避具有統(tǒng)治地位的母豬？是不是母豬沒有足夠的地方躺下？