Horses are non-ruminant herbivores of a type known as a "hind-gut fermentor." This means that horses have only one stomach, as do humans.
Probiotics are defined as live microorganisms, including Lactobacillus species, Bifidobacterium species and yeasts that may beneficially affect the host upon ingestion by improving the balance of the intestinal microflora of animals.
Plant extracts (phytogenics) are a group of natural growth promoters (NGPs) derived from herbs, spices or other plants.
Mycotoxins are toxins produced by mushrooms, moulds and yeasts. If maize or grain for example is badly stored, fungus may grow on it and may produce mycotoxins.