DISEASES OF SHEEP AND GOATS 211 



etc., into the marshy ponds, as they destroy the parasite 

 in its first stages of development, feeding on their inter- 

 mediate host, the snail. 



Medical. Treatment: This is of little value. After 

 an animal once becomes infected with the parasite, it 

 never makes a complete recovery, although Calomel ad- 

 ministered in ten grain doses every two or three weeks 

 appears to have a very good effect in some cases, if fed 

 freely on liitrogenous food and permitted to drink well 

 of pure running water. 



LUNG FEVER 



(Pneumonia — Congestion of the Lungs — Pulmonary 

 Apoplexy) 



Acute congestion and inflammation of the spongy tis- 

 sues of the lungs is frequently seen in sheep, the same as 

 in other animals. 



Cause : Sheep that are overdriven are subject to 

 Lung Congestion in acute or chronic form and sometimes 

 Pulmonary Apoplexy, and especially when in a plethoric 

 condition are predisposed to inflammation of the lungs. 

 The exciting cause is very much the same as in different 

 diseases of the air passage and it is not uncommon for 

 the inflammation to extend from these parts of the lungs. 

 However, there are a number of causes in addition to 

 those already mentioned. It frequently results when 

 sheep are accustomed to warm, comfortable quarters and 

 are changed to cold, drafty pens, or shipping some dis- 

 tance in open stock cars during cold weather. In fact, 

 any sudden chilling of the body is a common cause of 

 lung disorders. Giving fat sheep too much exercise when 

 they are not accustomed to it is a very frequent cause of 

 Congestion and Inflammation of the Lungs. This, may 

 occur when they are chased by dogs, etc., or when driven 

 to a distant market at too rapid a gait. Exercise during 

 the hot summer months is apt to cause congestion of the 

 lung substance, as well as heat stroke. Dipping sheep 



