Join Date: Oct 2009
Location: Just south of sanity
Start by adding one scoop of pellets per meal, and see how it goes from there.
Feeding horses isn't a one size fits all kind of thing. Each animal is different and based on their breed, age, health, amount of exercise, etc., it takes some tweaking to figure out how much each should get to keep them at a good weight.
I do have a question, though. Why are you feeding her Mare/Foal? Is she lactating or pregnant? If not, you might do better and spend less on a complete feed.