Wow! Thanks for all the suggestions! I'm sorry I've not been back on to respond sooner. It's been CRAZY around here. I still haven't managed to snap some pics but the birds in question are marked just like the Delaware in that last photo posted by broodymama2 but they have the small peacombs like the Sussex. They also have very yellow feet and aren't as filled out yet.
Also big shout out to Poultryqueen101. Your list was very helpful. We are just down the road (so to speak) in Jersy! I wish I could remember exactly when we got them but I do know it was before May, so not a broiler. And they were in the same batch that had the amberlinks. We got one of them ( I'm sure because my daughter named her Amber! Lol) I wonder if I popped in the mill one day if they might remember? Now that I'm thinking of it, thsts probably the smart thing to do. No wonder it took me a while to think of it!