I would just watch them for the next few days. The stress of the move & the change in food(including the cabbage)may be to blame.
If they look otherwise healthy & active, I don’t think you should be concerned. If they’re seriously ill, they definitely won’t look like happy chickens.
I’ve never raised Orpingtons, just Barred Rocks, R.I.Reds, & the standard brown-egg hybrid layers. I’ve heard good things about the Orpingtons’ personalities.Friends who raise them say they’re one of the friendliest breeds & I hope that everything works out well for you. Please let us know how it turns out. Good Luck!!!!