what is the range of hemoglobin in calves
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The hemoglobin concentration of calves was determined at weekly or biweekly intervals for periods ranging from 1 to 105 days of age. The values were highest during the first 15 days of life and gradually decreased until the 30th to 70th day of life. After this time there was a gradual increase in hemoglobin level. A large variation in hemoglobin levels between individual calves was evident. In breeds of which a large number of calves of each sex were studied the females had higher hemoglobin levels from birth to 75 days of age than did the males. Calves of the Red Dane breed and Sindhi-Jersey crossbreds and usually mixed crossbreds had higher hemoglobin values than calves of the Jersey and Holstein breeds.
Feeding 100 mg. of iron per day to calves that were moderately anemic caused an increase in the number of their red blood cells and hemoglobin levels and thus prevented a further decrease, which normally would have been expected. Iron alone or iron in combination with the copper, cobalt, and manganese cured the anemic condition in these young calves, whereas copper, cobalt, and manganese fed alone had no curative properties. A significant correlation between hemoglobin level and body weight gains was observed in the calves of one herd. Further studies are necessary on the practical importance of these findings.
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The hemoglobin concentration of calves was determined at weekly or biweekly intervals for periods ranging from 1 to 105 days of age. The values were highest during the first 15 days of life and gradually decreased until the 30th to 70th day of life. After this time there was a gradual increase in hemoglobin level. A large variation in hemoglobin levels between individual calves was evident. In breeds of which a large number of calves of each sex were studied the females had higher hemoglobin levels from birth to 75 days of age than did the males. Calves of the Red Dane breed and Sindhi-Jersey crossbreds and usually mixed crossbreds had higher hemoglobin values than calves of the Jersey and Holstein breeds.
Feeding 100 mg. of iron per day to calves that were moderately anemic caused an increase in the number of their red blood cells and hemoglobin levels and thus prevented a further decrease, which normally would have been expected. Iron alone or iron in combination with the copper, cobalt, and manganese cured the anemic condition in these young calves, whereas copper, cobalt, and manganese fed alone had no curative properties. A significant correlation between hemoglobin level and body weight gains was observed in the calves of one herd. Further studies are necessary on the practical importance of these findings.
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Dimock and Thompson (1) report an average of 8.96 grams of hemoglobin in 100 cc. of blood in an examination of 20 head of cattle of the four major dairy breeds in the Cornell dairy herd. The maxi mum was 12.75 grams and the minimum 6.75 grams. However, no de terminations were made on calves.
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