Animals that live on a farm are usually kept there for their produce, labor, or meat. For centuries the relationship between man and certain animals have developed in such a way that the former takes care of the animals throughout its life, and in return takes the produce, for example, milk from cattle, and eggs from poultry.
A single sheep produces more than 5,000 miles of wool per year; the total wool fiber produced by 100 animals in a year would be enough to reach the moon and back if they were laid down end to end.
Sheep and goats have rectangular pupils, helping them see much better at night.
Chickens are the closest extant relatives of the T-Rex.
Cows have a good memory, remembering things from up to 3 years ago.