Original Scientific Article Multiple studies have shown the importance of adequate nutrition for animals and humans and its effect on overall health. Therefore, the aim of this study was to investigate the effects of different nutritional regimes on the intestinal health of rats by evaluating different morphological and morphometric characteristics of small intestines, with the emphasis on the villus height:crypt depth ratio (V:C). For the experimental study, 24 clinically healthy adult Wistar rats were used. The rats were randomly divided into 3 groups: the control group (group A) was fed with conventional food, the second group (group B) with bakery products, and the third group (group C) with meat products. Samples of the duodenum and jejunum were collected for detailed morphological and morphometric analysis. A significant increase in the duodenal villi height was reported in group B (661.59 μm) and C (602.83 μm) compared to the control group (475.34 μm). The crypt depth values in the jejunum were significantly higher in group B (191.41μm) and C (246.23 μm) compared with the control (145.14 μm). The jejunal V:C ratio was significantly lower in groups B and C. The study showed significant morphological changes in the intestinal parameters in rats fed predominantly with meat and bakery products. These findings could be applicable in both veterinary and human medicine, underlining the significance of consumed food on gut health. https://macvetrev.mk/LoadArticlePdf/361 2024-03-15 5 13 https://doi.org/10.2478/macvetrev-2025-0010 diet intestines morphology rats Nedžad Hadžiomerović false 1 Department of Basic Sciences of Veterinary Medicine, Veterinary Faculty,University of Sarajevo, Sarajevo, Bosnia and Herzegovina AUTHOR Fuad Babović false 2 Department of Basic Sciences of Veterinary Medicine, Veterinary Faculty, University of Sarajevo, Sarajevo, Bosnia and Herzegovina AUTHOR Anel Vejzović false 3 Department of Basic Sciences of Veterinary Medicine, Veterinary Faculty, University of Sarajevo, Sarajevo, Bosnia and Herzegovina LEAD_AUTHOR Aida Bešić false 4 Department of Clinical Sciences of Veterinary Medicine, Veterinary Faculty, University of Sarajevo, Sarajevo, Bosnia and Herzegovina AUTHOR Elvir Čičkušić false 5 Pathology Clinic, University Clinical Center Tuzla, University of Tuzla, Tuzla, Bosnia and Herzegovina AUTHOR Nejra Dučić false 6 Department of Basic Sciences of Veterinary Medicine, Veterinary Faculty, University of Sarajevo, Sarajevo, Bosnia and Herzegovina AUTHOR Muhamed Katica false 7 Department of Clinical Sciences of Veterinary Medicine, Veterinary Faculty, University of Sarajevo, Sarajevo, Bosnia and Herzegovina AUTHOR Katica, M., Delibegović, S. 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