234 FARM ANIMALS 
15. Market classes of sheep.—When sold at market 
age, quality and condition play an important part in the 
prices obtained. Mutton sheep are classified as lambs, 
yearlings, wethers and ewes. In each of these classes 
there are a number of grades such as prime, common and 
inferior. Breeding sheep are marketed as ewes and 
bucks, and “feeder” sheep as bucks, stags, lambs, year- 
lings, wethers and ewes. 
Sheep are somewhat unique among domestic animals. 
They make use of food not relished by other animals, the 
goat excepted. They can subsist under conditions of 
food, water and climate that are unsuited to other domes- 
tic animals. Great areas of the world are by them made 
of economic importance. They produce at one time both 
food and clothing. No other fiber can quite take the 
place of wool. 
