Optimal nourishing of herbivores requires accurate rationing systems to fit at the best allowances and requirements of animals. Recently, the INRA feeding system for rationing ruminants has been updated with the development of its support software: INRAtionÒV5. Some outputs of this rationing system were compared with observed data obtained at MoSAR’s unit in dairy goats. Dairy goats were housed in digestibility crates. Individual weekly mean values of all results were pooled to obtain groups receiving the same basal roughage at similar stages of lactation. Several types of forages have been used: alfalfa hay, grassland hay, corn silage fed alone or associated with sugarbeet pulp silage or dehydrated alfalfa. Concentrates were either rich in fiber or non fiber carbohydrates. All diets were balanced to require energy and protein requirements. Goats were fed either separate feed ingredients (SF) or total mixed ration (TMR). Mean values were weighed by the number of observations within a group in the statistical analyses. Observations with a level of refusal below 7% were discarded. The data set included 281 observations distributed in 48 groups. Standard milk yield ranged from 0.67 to 6.80 kg/d (3.20 ± 1.227) and feeding level (FL) was comprised between 2.21 and 6.52 (3.87 ± 0.745.) The mean value of the organic matter digestibility (OMD) was 70.5 (±5.281, n = 281). The difference of the OMD observed and calculated (DiffOMD) was smaller than 0, with a significant difference between goats fed SF (5.33) compared to those receiving TMR (2.13). DiffOMD was correlated with FL. The regression coefficient between DiffOMD and FL was 1.36 which is half of the value proposed in the INRA 2018 system (2.74) from data mainly obtained in cattle and sheep. This means that dairy goats should be less susceptible to digestive interactions linked to FL as it was shown for the percentage of concentrate that has no detrimental effect of on OMD in goats. The cellwall (NDF) digestibility is globally well predicted by the model (NDFDobs = DFDcalc, r2 = 0.53, ngroups = 48, RSD = 14.1%) without any effect of feeding practice. N fecal output observed was also directly proportional to N fecal calculated (Nfecalobs = 0.983 Nfecalcalc, r2 = 0.62, ngroups = 48, RSD = 6.94 g/d) with close values. N urinary outputs observed was a little smaller than calculated (NUrineobs = 0.922 Nurincalc, r2 = 0.74, ngroups = 48, RSD = 11.8 g/d) with a higher constant value for goats fed SF (4.23) than TMR (2.42). This first test on a large number of diets is very promising and must be extended to a larger number of diets and in other locations, especially concerning the effect of the digestive interaction linked to feeding level.