The researchers studied how feeding Boerka goats a pellet concentrate with 60% Indigofera zollingeriana improved sperm quality. They measured various sperm parameters like volume, motility, and membrane integrity. The results showed that goats fed with 60% I. zollingeriana had higher ejaculate volume and better sperm concentration, motility, and membrane integrity compared to other groups. Sperm from the cauda epididymis also showed improved movement when goats were fed with 60% I. zollingeriana. Overall, the study suggests that feeding goats this specific concentrate can enhance the quality of their sperm.