prtncipi.es of iioese breeding 



331 



Wolff-Lehmann Standard, Showing the Amount of 

 Digestible Nutrients Required Per 1,000 Pounds Live 

 Weight for Horses at Light, Medium and Heavy 

 Work 



ArMSBY STANDAto, SHOWING THE AmOUNT OF DIGESTIBLE 



Protein and Energy Required Per 1,000 Pounds Live 

 Weight for Horses at Light, Medium and Heavy 

 Work 



Balanced ration. — Foods vary widely in composition 

 and they also vary considerably from the composition of 

 the animal body. To meet the needs of the animal it be- 

 comes necessary to mix the foods in the proper propor- 

 tion, so that the digestible nutrients will correspond to 

 the demands of the body. This is called balancing a 

 ration. Skill in balancing a ration depends much upon 

 our knowledge of the digestible nutrients contained in the 

 more common foods. It is rather a tedious undertaking, 

 however, as there is no mathematical formula, and we 

 must add to or take from the trial ration until the desired 

 standard is obtained. 



Nutritive ratio. — Since the only source of the protein 

 of the body is the protein of the food, this nutrient plays 

 an important part in the balancing of a ration. So im- 



