Answer

By Your Horse

Nutritionist Louise Jones replies:

If she’s in good condition, your current feed regime is sensible. However, to give her all the vitamins and minerals she needs, increase her Mare and Foal mix to one and half scoops per day, and decrease the chaff from two scoops a day to one-and-a-half.
You don’t need to feed limestone flour as there’ll be enough calcium in her mix. At three, she can move on to an adult ration, which will depend on her condition, workload and temperament. IDxWB crosses tend to maintain weight easily, so unless she’s doing strenuous work early in her training, she won’t need large amounts of concentrates. Her feed should be low in calories and have plenty of vitamins and minerals, so it can be fed in low quantities but still give a balanced diet.