Unmolassed sugar beet contains less than 5% sugar as the sugar has been extracted for use in human foods. Sugar beet pulp is the fibrous part that is left after the sugar has been extracted and is widely used in animal feeds. It is a source of highly digestible fibre and so is a great way to add energy to a horse’s ration, particularly those where it is desirable to keep sugar and starch intakes as low as possible. So yes, sugar beet pulp is suitable for a horse prone to over-excitable behaviour.