Originally Posted by sarahver
On the flat, aim for a very brisk to extended trot, steadily building up stamina.
Agreed...since you're in hill-less-land, try to work even those 2-3 miles at a quick trot. It's a good workout and keeping your mare in a nice steady trot 'groove' is great training, too.
As far as feed, we're not in alfalfa-land, but it is high in protein. We're pretty much all orchard and fescue around here and when we really work our mares, we'll add a 14% protein pellet feed. I'll defer response to anyone who feeds alfalfa.
Make sure you also up the calories the more you work her, too.