Did she have a long trailer ride to get to your barn? If she's not used to traveling or if it was a rough ride, she could have gotten a bit sore. Draft horses carry a lot of weight on those gorgeous big feet. It could also be nerves from being in a new place. Tell your vet if she continues to do it after a week or so. :)
And yes, it could just be nerves. She's desolate after being separated from her former pasturemate, plus she's still separated from my other 2 mares and is just obsessed with trying to be with them. Plus, we had a freaky December thunderstorm roll through. It poured for 2 days and nights, the paddock is horrendous mud, and the noise of the rain and thunder.. it's been a pretty stressful week for her.
Yes, I'll call the vet in a week no matter what. I am glad that he came and got to meet her and gave her a good look.
Thanks so much for your support and good ideas and thoughts. I really appreciate it!