ANIMAL FEEDS 195 



it is sometimes found in the manufacture of low-grade meat scrap 

 that no treatment is given to meat which would purify it; in other 

 instances it is treated with a strong acid. When such methods 

 are followed, there is danger of disease bacteria in the feed, or a 

 strong acid residue may remain when ready for market. Beef 

 scrap of this last character has been known to cause considerable 

 injury and loss of valuable birds. 



Pork scrap is sometimes available for poultry feeding, but it 

 contains a larger amount of fat and has a low digestibility, for 

 which reasons it is not as desirable as beef scrap. 



Bone products come next to meat scrap in popularity and 

 efficiency as animal matter for poultry. They are fed either green 

 or dried. The practice in preparing green bones is to secure them 

 daily from the meat shop and grind them up in bone cutters and 

 feed them fresh. If this method is followed, they have to be fed 

 in limited quantities, as the birds will not stand a heavy feeding. 

 The dried, crushed bone is a very efficient source of protein and 

 ash in baby-chick feeding. (See also page 201.) 



Animal Meal. Meat scrap, mixed with quite a large percentage 

 of bone and fat, is often ground up exceedingly fine, thoroughly 

 dried, and sold in the form of " animal meal." It has about the 

 same feeding value as meat scrap, but there is a greater possibility 

 of adulteration, and the feeder cannot be so sure of what he is using. 



Dried Blood. This is a dried product of slaughter-houses, and, 

 when properly sterilized and stored in dry places, will keep indefi- 

 nitely. It can be used to good advantage in limited amounts in 

 poultry mashes, especially to check diarrhoea ; however, it possesses 

 no advantage over a high-grade meat scrap or bone product. 



Fish Scrap. The feeding of fresh fish was quite extensively 

 practised at one time in localities where it could be obtained, 

 but, owing to the fact that it tainted the eggs and the flesh of 

 poultry, the practice was discontinued. Properly prepared fish 

 scrap, from which the oil has been entirely removed, is being fed 

 with very good results in certain sections, especially in California. 

 A very essential feature in the manufacture of fish scrap for poultry 

 feeding is that all the oil, which carries the objectionable odor 

 and flavor, should be removed. Some high-grade fish scrap is 

 manufactured at about one-half of the cost of meat scrap. This 

 contains considerable protein. If possible to obtain this, it will 

 make a very satisfactory substitute. 



Clams and other shell fish, if available in sufficient quantities, 



