Hi it depends on the age breed and size of your horse,the work it is doing and is it grazing or stabled.. all of this has to be taken into consideration... As a rough guide a horse should have 1% of it's body weight in roughage hay or haylage fibre cubes a day then either a mix or pencil that contains protein, chaff to stop the horse bolting it's food....
There are lots of variables to take into consideration, hours of turnout, quality of grazing, size, age and general health, and workload, so I can only speak from my experienceI like to feed 2 to 2.5% of forage (hay) daily and have fed up up 3% in Winter when its very cold. I feed minimal amounts of hard food in the Summer (Winergy Low Energy) and increase the amount gradually into Winter (Winergy Veteran or Condition)If you horse is excitable then it may be wise not to feed anything that is mollassed or that has a high sugar content Supplements can also be useful, depending on each horses individual needs, and your own personal viewpoint on their benefits.
Great advice Bev.. couldn't agree with you more... x
I do not think there is a plan to be had really as taking the time to look at the hoses condition attitude and the weather conditions that vary each season will say it all " As the carer of the horse we do not want obese excitable or poor condition in them ,but a well covered animal going into winter
Take a look at the thread: How can a horse loose weight.. there is an answer that fits your question too.