Total tract digestibility was unaffected by inclusion of soybean hulls in concentrate
Fecal parameters were unaffected by inclusion of soybean hulls
Streptococcus spp. and Lactobacillus spp. were unaffected by the experimental diets
Diets with up to 28% soybean hulls in the concentrate can be used as equine feed
Soybean hulls are a safe ingredient for equine feed concentrate.