Farm calls are a type of animal communication used by farmers to call their livestock. The most common farm calls are MOO (3 letters), BAA (3 letters), SOOEY (5 letters), BRAY (4 letters), OINK (4 letters), and BLEAT (5 letters). Each sound is associated with a particular type of animal, such as cows, sheep, pigs, and goats. Farm calls are used to attract the animals' attention and to encourage them to move in a certain direction.