How much to feed a horse should be calculated according to its weight, condition and its workload.

Mature horses who perform little or no work may be fed on good quality forage feed alone with no need to supplement their diet with any other feed. Horses kept at grass may require only supplemental forage feed during the winter. However, working horses, stabled horses, growing or breeding horses may require additional feed.

It should be remembered that any horse or pony having regular exercise and then rest days will require less feeding on the rest days to prevent Azoturia developing. Any sudden change in the type of feed or the time of feeding should be avoided.