Fig. 1.

Caecal VFA and NH₃-N. Mean difference between the two diets. The barplot is illustrating the mean difference between the two diets in NH₃N, VFA, acetate, propionate, and butyrate. Mean difference values above the zero line imply a higher mean value in the hay-fed horses than in whole oats–fed horses, whereas mean difference values under the zero line imply a lower mean value in the hay-fed horses than in whole oats–fed horses. Error bars represent standard deviations.