32$ Digeftmg ofjkeping Animals, fcfr. Book IX. 



geftion is therefore regulated by the ftate of the other 

 functions of the body *. 



By hunger and cuftom animals may be taught to eat, 

 and even to prefer, a very different kind of food from 

 that naturally defigned for their nourifhment : thus 

 pigeons have been made to live entirely on flefh. 

 Whether the gaftric juice is altered in its nature by a 

 difference of food, or in what other way the fyftem 

 accommodates itfelf to fuch a change, it is not eafy to 

 determine. 



* Hunter on Digeftion. See his volume on the Animal Economy. 



