BY-PRODUCTS AS STOCK FOOD.

Dominion, Volume 3, Issue 849, 22 June 1910, Page 10

BY-PRODUCTS AS STOCK FOOD.

DRIED BLOOD FOR CALVES. Tlie use of tho by-products of tho slaughter-houso-as animal foods has now assumed very great proportions in the United States. It is not so many . years since these waste products—refuse meat; blood, and offal generally—were . ground up and prepared into manures. A good deal is still so used as fertilisers. Some years ago, however, cxperi- . monts at the Indiana Experiment Station demonstrated that theso products, dried and ground up, were very rich in . ■•protein,'and made an admirable food for pigs. Since that timo "tankage," "is this is called, has been enormously prepared and sold from nearly all the' big packing houses in North America, where it is uow a .recognised feedingstuff of great merit. Later on, the. Utah Experiment Station investigated tho feeding qualities of dried blood, the results showing this to be doubly as xich in digestible proteins as the tankage, and that it was one of tho most stimulating foods for egg-production. As a result of this, many of the pack-ing-houses began separating the' blood from the "tankage,", dried it, and prepared it for sale as a poultry food. The chief buyers were the firms who make a speciality of poultry foods,- in ■the making-up of'which; in America, dried blood plays an important part, and especially in foods specially pre- ' -pared for eggrprpduction. The. latest development, in the'iiso of dried blood as a food is as an admixture with skimniilk in calf-rearing. Its digestibility, richness in proteins, and tho case with which it mixes with skim-milk made it specially valuablo for this purpose. It contains up to 14 per cent, of nitrogen, and up to 4 per cent, of phosphoric acid. , ,