Five Southdown wethers that were first prize pen of lambs at the 

 International Live Stock Exposition in 1910. 



Photographs of sheep teeth, showing changes that occur in the 

 order of appearance of the incisors. The photo on the upper left 

 hand shows a lamb's mouth with all temporary incisors. The upper 

 right hand photograph shows mouth of a sheep about one year old, with 

 the first pair of permanent incisors and the temporary incisors back 

 of them. The photo in the lower left hand corner shows the mouth 

 of a sheep about two years old, with two pairs of permanent incisors 

 appearing. The photograph in the center below shows the mouth of a 

 Ihree year old sheep, with three pairs of permanent incisors. The lower 

 right hand illustration is a photograph of a sheep's mouth when four 

 and a half to five years old. The incisors are all permanent, worn 

 down some and more sloping than the others. 



