The objective of this study was to evaluate the association of mannanoligosaccharides (MOS) and yucca extract (Bio-Balance®) on the apparent digestibility coefficients (ADC) of nutrients and metabolizable energy (ME) of diet and on intestinal health and faecal characteristics of dogs. Three extruded dry diets of the same formulation were evaluated. Diets contain: 0, 400, and 800 g/t inclusion of blend with MOS+yucca. Fifteen beagle dogs distributed in a completely randomized design (n=5) were fed during 30 days with the experimental diets, being 25 days of adaptation and five days of total faeces collection. There was no difference between the ADC and ME of diets (P>0,05). However, there was a decrease in ammonia, pH, faecal odor and increase in dry matter (P<0,05). A linear increase of acetic acid and total short chain fatty acids (SCFA) and a reduction of branched chain fatty acids (BCFA) of faeces were observed (P<0,05). The combination of MOS and yucca in the diet reduces ammonia and BCFA production, decreasing faecal odor. In addition, they increase the production of intestinal acetic acid and faecal dry matter of dogs, contributing to intestinal health and improving the faecal consistency of these animals.