Farm-Related Sayings and Expressions:

Don't count your chickens before they hatch.
(Meaning: Do not count on something before it happens.)

Hold you horses.
(Meaning: Slow down or calm down.)

A needle in a haystack.
(Meaning: It is hard to find.)

When pigs fly.
(Meaning: It is not likely.)

The black sheep of the family.
(Meaning: The odd person in the family.)

Do not look a gift horse in the mouth.
(Meaning: If someone gives you something, do not examine it closely for faults. People look at a horse's teeth to determine its age)

You can lead a horse to water, but you can't make him drink.
(Meaning: You can not make a person do something if they are unwilling.)

You can't make a silk purse out of a sow's ear.
(Meaning: You can't turn a valueless object into a valuable one.)