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Effect of Method and Level of Iron Administration on Growth, Hemoglobin and Hematocrit of Suckling Pigs

Cornell University, Ithaca, New York

Abstract

In these trials, 268 suckling pigs raised in concrete dry lot were used to compare methods and levels of iron administration. Intramuscular injection of 100 mg. (2 ml.) iron at 3 days and again at 10 days of age produced 24-day weights, hemoglobin and hematocrit levels equal to those of pigs whose dam's udders were sprayed daily with a ferrous sulfate solution. A single injection of 100 mg. iron at 3 days of age produced significantly lower hemoglobin (P<0.01) and hematocrit (P<0.05) than two injections (200 mg.). There were no significant differences among treatments in growth rate.

Oral tablets given at 3 days and 10 days of age to supply a total of 584 mg. iron produced significantly lower hemoglobin (P<0.01) and hematocrit (P<0.01) at 24 days of age than 100 mg. iron given intramuscularly at 3 days of age. While differences in growth rate were not statistically significant, scouring and general anemic appearance of pigs given oral iron tablets were noticeable. No toxic symptoms were noted in pigs receiving 200, 400, or 1,000 mg. of iron-dextran intramuscularly. There were no sex differences in any of the criteria measured.