This study researched the beneficial effects of supplementing the fodder ratio with selenium and respectively L-carnitine, on some hematological indicators, hematological indices and biochemical indices in chicks. After supplementing the fodder ratio with selenium (2 g/kg) for four weeks, in eight Rosso hybrid chicks (experimental group). This experiment used organic selenium (Sel-Plex®, AllTech Kentucky, USA). The erythropoiesis increase can be attested by the decrease of the mean erythrocyte volume (MCV), concluding that a large number of young erythrocyte with a smaller volume, are released into the blood circulation. Concomitantly, because of its antioxidant role on the red blood cell membrane, the selenium prevents the degradation of the mature erythrocytes. Because of the intensification of the erythropoiesis, the red blood cell count and the hemoglobin value increase, therefore the MCHC also increases, and the tissue oxygenation rate is amplified, it is justified to believe that by supplementing the fodder ratio with Se the health status of the livestock, but also their reproductive performances. The beneficial effects of supplementing the fodder ratio with organic selenium on some blood biochemical indices in chicks: the increase of ascorbinemia, blood turbidity and lipidemia are noticed, while the piruvicemia, proteinemia, glicemia, phospholipidemia and the cholesterol levels in blood decrease. The increase or decrease of these biochemical indices consequent to the supplementation of the fodder with organic selenium will result into the prevention of oxidative stress and into a higher efficiency of fodder conversion rate. After supplementing fodder ratio with L-carnitine (2 g/kg) for four weeks, in eight Rosso hybrid chicks (experimental group) This experiment used L-carnitine ( L-carnitine formula 985, Wonder Laboratories, USA). In chicks fed with L-carnitine supplemented fodder, both the red blood cell count (RBC) and the hemoglobin value have the tendency to increase, due to the erythrocyte membrane osmotic resistance increase, therefore maintaining the membrane functions by diminishing the calcium flux in the erythrocyte. As well, L-carnitine protects erythrocyte membrane lipids, by preventing their peroxidation and so preventing the installation of oxidative stress. but also L-carnitine effect on the hematopoietic bone marrow, by increasing the number of colony-forming unit erythrocyte (CFU-E). The hematocrit (HCT) also has the tendency to increase, as the plasmatic mass increases in the detriment of the cellular mass. After feeding the experimental group of chicks with L-carnitine supplemented fodder, several alterations of the blood biochemical panel have been noticed, by the more significant or not increase or decrease of the abovementioned indices. The increase of ascorbinemia, blood turbidity and insignificantly elevated glycemia is noticed, while the piruvicemia, proteinemia, lipidemia, phospholipidemia and the cholesterol levels in blood decrease. All these alterations have beneficial effects on the metabolism and would, consequently lead to a better assimilation of fodder and a better economic output.