Familiar Animal Sounds - Cows, Chickens, Sheep, Dogs, Cats, Pigs 

Cows moo to communicate with herd members or when hungry. Chickens cluck when laying eggs or calling each other in the flock. Sheep baa to call the flock or when they need help. Dogs bark when excited, happy, or when something unusual happens. Cats meow to get attention or purr when they are relaxed and content. Pigs oink when communicating with each other or when they are happy.