Hematological and Biochemical Parameters of European Quails (Coturnix coturnix coturnix) Fed Diets with Different Fiber Pro-Files, with and Without Stimbiotic Supplementation, from 1 to 35 Days

Quail farming requires balanced diets to ensure bird health and performance, and die-tary fiber and feed additives can influence immune and physiological responses. This study evaluated stimbiotic supplementation in diets with different fiber profiles on hematologi-cal and biochemical parameters of European quails (Coturnix coturnix coturnix). Six hundred quails, from 1 to 35 days of age, were assigned to 12 treatments with 5 replicates of 10 birds each. Diets included a corn-soy control, two basal diets with corn (low soluble fiber) or wheat (high soluble fiber), and three mixed diets combining corn and wheat in different proportions, each with or without 0.01% stimbiotic. Blood samples were collected at 14 and 35 days. In the early phase (1–14 days), stimbiotic in-creased hemoglobin and reduced total white blood cells, heterophils, and lymphocytes, indicating improved im-mune status, while fiber influenced liver enzyme activity and triglycerides. In the growth phase (15–35 days), stimbiotic maintained positive effects on hemoglobin and packed cell volume, and fiber increased eosinophils, modulating immune response without altering other parameters. In conclusion, fiber had a func-tional role, particularly during growth, and stimbiotic improved immunity in both phases, showing that both strategies enhance health and performance in European quails.