By Alick Drummond Buchanan Smith, Olive Janet Robinson, D.M. Bryant
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25 per cent, but by rich protein feeding, it could be raised by as much as 2 per cent. Less variation was found in the albumen content than in the fat content of normal milk. HEMPEL gives a summary of previous work on milking capacity of sows and the following details may be of interest. OSTERTAG and ZUNTZ (1908) found the amount of milk taken by one pigling at one suckling to be 60-75 gms. 375 Kgs. 826 Kgs. 746 Kgs. during the 8th week. 61 Kgs. 27 Kgs. 08 Kgs. 16 Kgs. 27 Kg. 6 Kg. 890 Kg. 625 Kg.
He found that the more highly improved the pig, the more it differs from the wild as regards hair and skin structure. -e bristles, which are coarser, longer and thicker than those of the improved pig. The stiff bristles are straight, but the soft ones are often slightly twisted. In the wild type, there is also a greater development of the sebaceous glands, and the muscles of the follicles (arrectores Pili) are larger; the number of sweat glands is approximately the same but they are more scattered.
Heavy milking sows lose a considerable amount of weight; the loss appeared to be great during the first 4weeks; the weight then was maintained at about the same level and finally rose gradually. 7 kgs. 1 kgs. HEMPEL concludes his observations by stating that (1) milking capacity in sows is inherited,(2) individual variation is to be found both as regards total yield and the shape of the lactation curve, and (3) the amount of milk produced increases with litter size. OHLIGMACHER confirms the observations of HEMPEL.