The dairy cow experiences the most significant impact from negative energy balance during this period, which adversely affects reproductive health. Consequently, most pathologies affect dairy cows during this time frame. Thus, with the primary objective of reducing the incidence of these pathologies on dairy farms, we questioned whether supplemental zeolite administration in cattle feed would affect metabolism and reproductive health. Therefore, we proposed introducing an antepartum and postpartum supplementation of 400 g of zeolite in the basal diet. The control group received only the basal diet without zeolite supplementation. Monitoring the results stemmed from the consideration that reproductive health can only be present based on an unaltered energy metabolism. Hence, we deemed it necessary to analyze several metabolic markers in light of the expected outcomes concerning reproductive health. Cows treated with zeolite exhibited a calving to first service interval 12.78 days earlier than those in the control group. Moreover, the average number of services per conception used for future gestation was 0.44 lower in the zeolite-treated group compared to the control group (p<0.05). Additionally, the treatment group showed a lower presence of pathogens in the uterus and displayed a more favorable average uterine score. Observations following the completion of the research point towards an improvement in the health of transition dairy cows, opening a new path for dairy farms in terms of preventing postpartum pathologies. Indeed, the benefits from this study primarily impact the animals rather than directly influencing milk production. Therefore, further research is necessary in this regard.

Background: The development of new protocols has become a priority today in the context of the adverse effects of conventional treatments. Zeolite falls into this category due to its numerous applications reported in the specialized literature. In this study, the main expected objectives were to demonstrate that intrauterine administration of zeolite can contribute to improving the indicators underlying the development of pathologies during the postpartum period. Methods: To determine the dosage and potential toxic effects on the uterine mucosa, we conducted a study on rats, to which we administered different doses on the second day after delivery. Ultrasound measurements of the uterus, collection of bacteriological samples and uterine tissue were performed at 7, 14 and 21 days. The results were satisfactory in terms of tissue effects, with the 20% dosage being the most suitable. Following the completion of the preliminary study, we grouped the animals into two equal groups (n=32). Intrauterine administration of zeolite was performed on the second day after delivery and monitoring of uterine involution was carried out on days 7, 14 and 21 of the puerperium. At 14 days, we collected samples to determine the number of bacteria and uterine tissue. Result: The data obtained indicate that the group receiving intrauterine zeolite (n=16) experienced a decrease in the number of bacteria, significantly faster uterine involution on days 14 and 28, a more favourable uterine score and a significantly shorter service period. However, no significance was established regarding the number of doses of seminal material used.