Anatomical studies No. 51. Hypermastia and hyperthelia in cattle

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The influence of rations low in certain minerals on the composition of the blood and milk of cows, and on the blood of their progeny

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Studies in native animal husbandry : 6. A note on Ovambo cattle

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Digestibility of lucerne hay with special reference to experimental technique in digestion trials (second report)

(1) In a continuation of the study of the digestibility of the same lucerne hay by the same steers at different times further evidence of a period influence on digestibility was obtained. This influence could be reduced or eliminated by following a simplified technique in planning digestion trials with different feeding stuffs. (2) The digestion of lucerne hay by bovines would seem to improve with age in these animals.The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format

Domsiekte or pregnancy disease in sheep. III

(1) It has been confirmed that a sudden and drastic reduction in diet of fat ewes in the fourth month of pregnancy causes typical domsiekte or pregnancy disease. The condition was evinced clinically, chemically and pathologically. (2) Similar treatment of fat, non-pregnant ewes caused the same changes in blood chemistry as seen in pregnancy disease in some, and post-mortem findings typical of the disease in others. No clinical symptoms were observed in non-pregnant ewes. (3) In the non-pregnant group no correlation could be found between chemical changes, post-mortem findings and clinical symptoms. (4) The non-pregnant ewes survived for a very much longer period than the pregnant ewes. (5) A hitherto undescribed pathological finding, namely hypertrophy of the retico-endothelial system of the lymph nodes is recorded. (6) Indications are given that the use of alkaline dosing has no effect on the formation of acetonaemia. (7) Treatment by means of rapidly active purgatives and sugars is indicated.The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format

The effect of body stores and of method of supplementation on the efficiency of calcium and phosphorus utilization by sheep

(1) The Ca and P metabolism of two groups of young sheep, depleted of these minerals, was investigated in a series of three balance studies. (2) During the first 10 days on the bone meal supplemented ration, the inorganic P of the blood rose sharply from approximately 2•0 to 5•0 mgm. per 100 c.c. of blood, a level which was more or less maintained to the end of the experiment. (3) Under the conditions obtaining the method of bone meal supplementation had no influence on the efficiency of utilization of Ca and P. The implication of this for the problem of phosphate feeding under practical conditions is briefly discussed. (4) Ca and P utilization dropped considerably in the course of the 80 days on the enriched ration. Retention figures for Ca decreased from 22•5 to 12•7 per cent. and those for P from 53•1 to 32•2 per cent. (5) Due to the fact that no observations are available on the extent of replenishment during the period of bone meal feeding the final interpretations of these results must await the outcome of further investigations.The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format

The influence of processing on the efficiency of proteins

Employing an improved nitrogen balance method the influence of mild heat treatment on the digestibility and biological value of a mixture of plant proteins has been determined. The heat treatment resulted in a small though significant improvement in the digestibility of the proteins. Protein quality was, however, not affected.The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format

Domsiekte or pregnancy disease in sheep. I. A review of the literature

The available literature is reviewed and where possible conclusions are drawn. References are listed which deal either directly or indirectly with the question of Pregnancy Disease of sheep.The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format

The Onderstepoort small animal colony

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Studies in mineral metabolism XXXV. The role of iodine in the nutrition of sheep

When the daily ration of Merino ewes contained 0.05 gm. KI for a period of about twelve months no effects were observed in bodyweight and food consumption. Reproduction was, however, abnormal in all the groups receiving the KI supplement, the effects of which were more pronouncedly deleterious in sheep on a carotene low diet than when 200 grm. greenfeed were supplied daily. The response to increased protein feeding in the form of bloodmeal was marked by the detrimental effect of KI on reproduction. As all the rations can easily be improved both in quality and palatability it cannot be inferred that the quantity of KI given will affect reproduction in sheep adversely under ideal feeding conditions. The conclusion is justified, however, that when greenfeed is absent or inadequate as frequently happens in practice good quality protein is not available and the incorporation of KI in sheep licks is distinctly dangerous and may even cause losses due to abnormal reproduction.The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format