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In other words, we should all be receptive, but careful in our assimilation, remembering that some of the great operations in surgery, for example, came from laymen in low life, as the operation for stone, and even the operation of spaying came from a swineherd.
The proper time for spaying is about five or six weeks after calving, or at the time when the largest quantity of milk is given. There seems to be some advantages in spaying for milk and butter dairies, where attention is not paid to the raising of stock.
The result, in regard to the last two spayed cows, was, as in the case of the first two, entirely satisfactory, and fully established, as Mr. Winn believed, the fact, that the spaying of cows, while in full milk, will cause them to continue to give milk during the residue of their lives, or until prevented by old age.
The advantages of spaying milch-cows are thus summed up by able French writers: First, rendering permanent the secretion of milk, and having a much greater quantity within the given time of every year; second, the quality of milk being improved; third, the uncertainty of, and the dangers incident to, breeding being, to a great extent, avoided; fourth, the increased disposition to fatten even when giving milk freely, or when, from excess of age or from accidental circumstances, the secretion of milk is otherwise checked; fifth, the very short time required to produce a marketable condition; and sixth, the meat of spayed cattle being of a quality superior to that of ordinary cattle.
Since that time, he has operated upon some twenty cows, all of which, with a single exception, have thus far proved satisfactory. Several of these cows are under the direction of a committee from the Philadelphia Society for promoting Agriculture, whose duty it is to have a daily record kept of each cow's yield of butter and milk, for one year from the time of spaying.
The removal of the ovaries, or spaying of the female, used to be often practised, and packs of spayed bitches were, and still are, occasionally kept.
The method of operating is not the same in the different species. In young heifers and sows, the flank operation is preferred, and in mares and cows, the vaginal operation. The median line operation is practised in bitches. A spaying emasculator, or ecraseur, are the special instruments need for removing the ovaries. The animal must be properly confined for the operation.
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