Assalamu Alaikum wa Rahmatullahi wa Barakatuh
And most surely there is a lesson for you in the cattle; we give you to drink of what is in their bellies-- from betwixt the feces and the blood-- pure milk, easy and agreeable to swallow for those who drink. :: Surat al Nahl (66)
In The Hadith of Rasul Allah Muhammed (( Sala Allaahu Aliho Wasalaam))
It is narrated on the authority of Abu Huraira that, the Messenger of Allah Muhammed (May peace and blessings be upon him) remarked: Tranquility is found among those who rear goats and sheep. Muslim :: Book 1 : Hadith 87