INTRODUCTION: The gut microbiota plays an important role in the health of dogs, but treatment with antibiotics causes marked dysbiosis. The objectives of this study were to evaluate the impact of yeast probiotic METHODS: Twenty healthy adult dogs were divided into a control and a yeast probiotic group receiving 1g/kg of RESULTS AND DISCUSSION: At D0, two distinct microbiota profiles comprised of dogs from both groups, control and probiotic, were identified. One profile had higher abundances of species related to stress and inflammation, and the other comprised species associated with good intestinal health. After three days of supplementation with yeast probiotic