Thank you everyone! I'm currently trying to find some hay guys, I'm new to the area just coming from Kansas but people in the NOVA Southern MD area are really accommodating.
She will be in a pasture with LOTS of grass to graze on, I've got a great deal in her boarding for free with the exchange of purchasing hay for her and 2 small arabians. I wanted to make sure she's getting a good balanced diet, but I've noticed how different it is with drafts.
The reason I was going to ask my grandpa and father was because they have owned Belgians, almost continuously on my grandpa's farm.
What I know about her is that:
1. She hasn't been grained for years (but LOVES it)
2. She has maintained her weight fairly well in that time on just hay.
3. She will have a low to moderate work level (I'm going to be working her in the round pen for about 30 minutes a day, then work up to riding at least once or twice a week)
So she's a pretty easy keeper with no health issues or vices.
For the oats, I know that they are low in starch, rich in fat, and has a fair amount of digestible protein.
And she is super gentle and just a love! I fell for her hard and I am anxiously awaiting tomorrow! (though it might not be until next weekend)
I'll be posting lots of pictures of her.