COOL FIBRE EXTRA is an excellent Fibre Base that you can use to begin to build your total meal Ration.  Include a 'Long Fibre' in your bucket, such as chaff or chaffage, to support peristalis in the digesta and to encourage your horse to chew and grind his meal to support additional saliva production.
Include any salt, cereals, supplements and minerals as you desire; or are advised by a Equine Health Professional.