RATIONAL FEEDING OF ANIMALS 



361 



use the prices of your local or home market. Select three of the 

 cheapest and three of the most expensive foods from the list. 



484. Sanitary Conditions Satisfactory results in the 

 feeding of animals can be secured only under the best 

 sanitary conditions. When animals are kept in crowded 

 quarters, deprived of pure air and sunlight, they fail to 

 make the best use of the food consumed. Carbon dioxid 

 thrown off from the lungs and ammonia produced from 

 decaying manure form ammonium carbonate, a volatile 

 and irritating compound. Sunlight is an important fac- 

 tor for promoting animal growth. Experiments with 

 growing calves have shown that under the same condi- 

 tions of feed and management, animals reared with an 

 abundance of sunlight make better gains in weight, and 

 are more vigorous than those confined in dark quarters. 

 The best results are obtained in the feeding of animals 



