DIAGNOSIS AND SYMPTOMS OF DISEASE ■ 15 



weather, the coat of hair becomes heavy and rough. This is a 

 provision of nature and enables them, as long as the coat is dry, 

 to withstand severe cold. 



Horses that are in a low physical condition, or when accus- 

 tomed to hard work, if then kept in a stall for a few days without 

 exercise, commonly show a filling of the cannon regions of the 

 posterior extremities. This condition also commonly occurs in 

 disease and in mares that have reached the latter period of 

 pregnancy. Sheep that are unthrifty and in a poor physical con- 

 dition, especially if this is due to internal parasites, frequently 

 develop dropsical swellings in the region of the jaw, or neck. 



Body Excretions. — The character of the body excretions, 

 fiieces and urine may become greatly changed in certain diseases. 

 It is important that the stockman or veterinarian obsem^e these 

 changes, and in certain diseases make an analysis of the urine. 

 This may be necessary in order properly to diagnose the case. 



Behavior of the Animal. — When tlie body temperature is 

 high, the animal may appear greatly depressed. If suffering 

 severe pain, it may be restless. In diseases of the nervous sys- 

 tem, the behavior of the animal may be greatly changed. 

 Spasms, convulsions, general local paralysis, stupid condition and 

 unconsciousness may occur as symptoms of this class of disease. 



QUESTIONS 



1. What information is necessary in order to be able to recognize or diag- 



nose disease? 



2. What are the general symptoms of disease? 



3. W^hat are the subjective symptoms of disease? 



4. Describe method of taking the pulse beat in tlie different animals and its 



character in health and disease. 



5. Give the ratio of the heart beats to the respirations in the different species 



of animals. 



6. What are the normal body temperatures in the different domestic animals ? 



7. What are the visible mucous membranes? 



8. Is the condition of the coat and skin any help in the recognition of 



disease ? 



