The Effects of Parenteral Iron Administration on Thyroid Hormones, Hematology, Oxidative Stress Characteristics, Performance, and Health in Neonatal Holstein Calves.

The present study investigated the effect of iron supplementation on thyroid hormones concentrations, oxidative stress characteristics, complete blood count (CBC) and serum biochemistry, and performance and health in calves of two groups: test group (n = 17, intramuscular injection of 500 mg iron-dextran on the 2nd day of life) and control group (n = 17, intramuscular injection of normal saline at the same time). Blood samples were taken from all of the calves instantly after birth and at 7, 14, 21, 28, and 90 days of age. Duration of treatment for diseases, body weight, height, and length were measured at each sampling time to evaluate growth and health.