The variations in the yield of milch cows are caused more by the variations in the nutritive elements of their food than by a change of the form in which it is given. “A cow, kept through the winter on mere straw,” says a practical writer on this subject, “will cease to give milk; and, when fed in spring on green forage, will give a fair quantity of milk. But she owes the cessation and restoration of the secretion to respectively the diminution and the increase of her nourishment, and not at all to the change of form, or of outward substance, in which the nourishment is administered. Let cows receive through winter nearly as large a proportion of nutritive matter as is contained in the clover, lucerne, and fresh grasses, which they eat in summer, and, no matter in what precise substance or mixture that matter may be contained, they will yield a winter’s produce of milk quite as rich in caseine and butyraceous ingredients as the summer’s produce, and far more ample in quantity than almost any dairyman with old-fashioned notions would imagine to be possible. The great practical error on this subject consists not in giving wrong kinds of food, but in not so proportioning and preparing it as to render an average ration of it equally rich in the elements of nutrition, and especially in nitrogenous elements, as an average ration of the green and succulent food of summer.”

We keep too much stock for the quantity of good and nutritious food which we have for it; and the consequence is cows are, in nine cases out of ten, poorly wintered, and come out in the spring weakened, if not, indeed, positively diseased, and a long time is required to bring them into a condition to yield a generous quantity of milk.

It is a hard struggle for a cow reduced in flesh and in blood to fill up the wasted system with the food which would otherwise have gone to the secretion of milk; but, if she is well fed, well housed, well littered, and well supplied with pure, fresh water, and with roots, or other moist food, and properly treated to the luxury of a frequent carding, and constant kindness, she comes out ready to commence the manufacture of milk under favorable circumstances.

Keep the cows constantly in good condition, ought, therefore, to be the motto of every dairy farmer, posted up over the barn-door, and over the stalls, and over the milk-room, and repeated to the boys whenever there is danger of forgetting it. It is the great secret of success, and the difference between success and failure turns upon it. Cows in milk require more food in proportion to their size and weight than either oxen or young cattle.

In order to keep cows in milk well and economically, regularity is next in importance to a full supply of wholesome and nutritious food. The healthy animal stomach is a very nice chronometer, and it is of the utmost importance to observe regular hours in feeding, cleaning, and milking. This is a point, also, in which very many farmers are at fault—feeding whenever it happens to be convenient. The cattle are thus kept in a restless condition, constantly expecting food when the keeper enters the barn, while, if regular hours are strictly adhered to, they know exactly when they are to be fed, and they rest quietly till the time arrives. Go into a well-regulated dairy establishment an hour before the time of feeding, and scarcely an animal will rise to its feet; while, if it happens to be the hour of feeding, the whole herd will be likely to rise and seize their food with an avidity and relish not to be mistaken.

With respect to the exact routine to be pursued, no rule could be prescribed which would apply to all cases; and each individual must be governed much by circumstances, both in respect to the particular kinds of feed at different seasons of the year, and the system of feeding. I have found in my own practice, and in the practice of the most successful dairymen, that, in order to encourage the largest secretion of milk in stalled cows, one of the best courses is, to feed in the morning, either at the time of milking—which I prefer—or immediately after, with cut feed, consisting of hay, oats, millet, or corn-stalks, mixed with shorts, and Indian, linseed, or cotton-seed meal, thoroughly moistened with water. If in winter, hot or warm water is far better than cold. If given at milking-time, the cows will generally give down the milk more readily. The stalls and mangers ought always to be well cleaned out first.

Roots and long hay may be given during the day; and at the evening milking, or directly after, another generous meal of cut feed, well moistened and mixed, as in the morning. No very concentrated food, like grains alone or oil-cakes, should, it seems to me, be fed early in the morning on an empty stomach, though it is sanctioned by the practice in the London milk-dairies. The processes of digestion go on best when the stomach is sufficiently distended; and for this purpose the bulk of food is almost as important as the nutritive qualities. The flavor of some roots, as cabbages and turnips, is more apt to be imparted to the flesh and milk when fed on an empty stomach than otherwise. After the cows have been milked, and have finished their cut feed, they are carded and curried down, in well-managed dairies, and then either watered in the stall, which in very cold or stormy weather is far preferable, or turned out to water in the yard. When they are out, if they are let out at all, the stables are put in order; and, after tying them up, they are fed with long hay, and left to themselves till the time of next feeding. This may consist of roots, such as cabbages, beets, carrots, or turnips, sliced, or of potatoes, a peck, or, if the cows are very large, a half-bushel each, and cut feed again at the evening milking, as in the morning, after which water in the stall, if possible.

The less cows are exposed to the cold of winter, the better. They eat less, thrive better, and give more milk, when kept housed all the time, than when exposed to the cold. Caird mentions a case where a herd of cows, which had been usually supplied from troughs and pipes in the stalls, were, on account of an obstruction in the pipes, obliged to be turned out twice a day to be watered in the yard. The quantity of milk instantly decreased, and in three days the falling off became very considerable. After the pipes were mended, and the cows again watered as before, in their stalls, the flow of milk returned. This, however, will be governed much by the weather; for in very mild, warm days it may be judicious not only to let them out, but to allow them to remain out for a short time, to exercise.

Any one can arrange the hour for the several processes named above, to suit himself; but, when once fixed, let it be rigidly and regularly followed. If the regular and full feeding be neglected for even a day, the yield of milk will immediately decline, and it will be very difficult to restore it. It may safely be asserted, as the result of many trials and long practice, that a larger flow of milk follows a complete system of regularity in this respect than from a higher feeding where this system is not adhered to.

One prime object which the dairyman should keep constantly in view is, to maintain the animal in a sound and healthy condition. Without this, no profit can be expected from a milch cow for any considerable length of time; and, with a view to this, there should be an occasional change of food. But, in making changes, great care is required to supply an equal amount of nourishment, or the cow falls off in flesh, and eventually in milk. We should therefore bear in mind that the food consumed goes not alone to the secretion of milk, but also to the growth and maintenance of the bony structure, the flesh, the blood, the fat, the skin, and the hair, and in exhalations from the body. These parts of the body consist of different organic constituents. Some are rich in nitrogen, as the fibrin of the blood, albumen, &c.; others destitute of it, as fat; some abound in inorganic salts, phosphate of lime, salts of potash, &c. To explain how the constant waste of these substances may be supplied, Dr. Voelcker observes that the albumen, gluten, caseine, and other nitrogenized principles of food, supply the animal with materials required for the formation of muscle and cartilage; they are, therefore, called flesh-forming principles.