Originally Posted by Skyseternalangel
Make sure that your horse gets access to lots of hay and lots of water. They tend to eat and drink a lot more than the average horse due to their size. Other than that, there isn't much of a difference.
There's the big thing. All horses should have enough hay or grazing to keep their cut working most of the day.
Don't know about spotted draft, but most draft and their crosses tend to be easy keepers, so the challange is keeping them from putting on too much weight. My two Friesian/Saddlebred crosses are more filled out (e.g. One about 16.3, 1350 lbs) than two TB I know, but the TB owners are giving their horses more feed (same I that I use) and a more fattening hay always available. Easy keeper vs hard keeper.
If your horse is very easy keeper you'll need to watch the weight until you get the rate correct. Had to take mine off of alphalfa mix hay and use a low quality, and even with that one is still trying to put on more weight. Keeping their gut working, without putting on excess weight can be a challange. Since my are pasture kept they can eat all the time, so I have to regulate the amount of feed (and work them more). Plenty of water is critical for digestion.