348 PRODUCTIVE FEEDING OF FARM ANIMALS 
mercial fish scrap fed in normal amounts to laying hens will not 
taint the eggs laid. 
Green cut bone from the butcher shop, which consists of waste 
trimmings with adhering particles of meat, is a very desirable 
poultry feed, when finely ground and fed perfectly fresh. It is 
more palatable than dried scraps because it is fresh and succulent. 
It is usually fed at the rate of about one-half ounce per hen per 
day. If fed alone, the fowls may be given all they will clean up 
in fifteen minutes about noon. 
' Bonemeal or dried commercial ground bone is added to poultry 
rations to supply calcium phosphate to build strong bone in growing 
stock, to furnish lime for shell-making in laying stock, and for 
other purposes. Commercial meat scrap usually contains enough 
bone for adult stock, but for young stock a small amount of bone 
meal should be included in the ration. When feeding meat scrap 
with a very high protein content, ground bone should also be fed 
with it as the very high grades of scrap do not-contain as much bone 
as the average grades. 
Dried blood is used to some extent for poultry but is not as 
suitable as the feeds mentioned above. It is very concentrated and 
must be fed with great care. It is also not very palatable. 
Linseed meal and soybean meal’ are very desirable high- 
protein vegetable feeds to be included in a poultry-laying ration 
because (1) they are rich in protein and may be used to advantage 
as substitutes for a part of the animal protein usually fed; (2) 
these feeds have a gently laxative and natural tonic effect on the 
digestive system and have been found very beneficial in helping the 
birds to come strongly through the molt as well as in promoting 
health and production at all times. The two feeds are quite simi- 
lar in feeding value but soybean meal is perhaps somewhat more 
palatable than linseed meal. Such feeds may constitute five to ten 
per cent of the mash. 
Cottonseed meal may be given in the dry mash either in place 
_ of or along with the linseed meal ; but its use should always be under 
the watchful eye of the feeder, as it tends to constipate. 
Green Feeds.—Some sort of vegetable feed is as essential to the 
continued health and vigor of poultry as is the grain ration. Its 
function in the bird’s economy is not so much to furnish nutriment, 
although it does this to some degree, as it is to act as a natural tonic 
on the fowl’s whole system. Green feeds stimulate the liver, induce 
a copious secretion of digestive fluids and instil into the very cells 
