NAF General Purpose Supplement 1. 5kg. NAF General Purpose Supplement is a broad spectrum vitamin and mineral supplement ideal for horses in light-medium work. NAF General Purpose Supplement is designed to complement a high fibre, low concentrate diet and is ideal for horses that are being fed less that the manufacturers recommended daily rates of hard feed and for horses on a mostly forage diet. Horse and Ponies Recommended Daily Amounts Horse Active - 60-75g per day = 2-2 ½ scoops per day Resting - 46-60g per day = 1 ½ -2 scoops per day Ponies Active - 30-60g per day = 1-2 scoops per day Resting - 30g per day = 1 scoop per day A 1. Read more…5kg tub fed at 60g per day will last approximately 25 days.