CATTLE FEEDING. 157 



(2.75 lbs.) for every 500 kilogrammes (1100 lbs.) of live weight, 

 and that of the digestible carbohydrates G.750 kilogrammes 

 (14.85 lbs.) — 200 grammes (.44 lb.) being fats. This gives the 

 nutritive relation 1 : 5.4. Such a ration should contain about 12 

 kilogrammes (26.4 lbs.) dry substance. 



In order to obtain the highest possible yield of milk when using 

 hay of average quality-, it is best to add an easily digestible fodder 

 containiug a high percentage of albuminoids. Although a smaller 

 quantit}- of digestible albuminoids than 1.250 kilogrammes (2.751bs.) 

 for every 500 kilogrammes (1100 lbs.) of live weight per da}^, say 

 1 kilogramme (2.2 lbs.) will still give rise to a satisfactorj- produc- 

 tion of milk, nevertheless it is far more economical to have rations 

 rich in albuminoids as the quantit}' of milk will be greater and the 

 period of milk production longer. It can easily be seen, that good 

 milch cows fed with fodder containing less than 1.250 kilogrammes 

 (2 75 lbs.) of albuminoids will utilize them largely for the produc- 

 tion of milk, and ver^' little will be left for other productions, 

 although the quantity of fats in the fodder might be as high as 200 

 grammes (.44 lbs.) 



From what has been said, it might be expected that by increasing 

 the quantities of albuminoids and fats in a ration, the quantities of 

 these substances would effect an increase in the milk. Experiments 

 in this direction do not indicate this to be exactly the case ; they 

 have been tried at Hohenheim, Mcickern, etc., and the result of 

 adding a fatty substance, such as colza oil, linseed oil, to the ration 

 has been in some, though not all cases, to slightly increase the 

 quantity of milk produced without increasing the percentage of fat, 

 in some instances the percentage of fat actually decreased. 



From experiments upon goats it would seem that the mixing of 

 fats (poppy oil) with their rations, will, provided the ration be very 

 rich in albuminoids, increase the percentage of fat in the milk, while 

 in a ration poor in albuminoids the opposite effect was noticed. 



It must be remembered that a sudden change in the fodder of 

 milch cows has an influence upon the quality of the milk, and 

 especially upon its contents in fat, but it will be found that if the 

 change from one kind of fodder to another be made, that the compo- 

 sition of the milk will remain nearly the same, or if some time be 

 ,not allowed to pass after the sudden change of fodder has been 

 made before the milk be examined, it will be found to have nearly 

 the same composition it had before the fodder was changed. All 



