Possibly. Or maybe it was only the dinosaurs in this group, the theropods, that had them. Or that had them to a significant degree.

I still picture the giants being featherless, just as modern elephants, rhinos, and hippos, are hairless, or mostly hairless, with only a few coarse bristles. I am not, however, aware of anything in the literature on this topic, so I have no evidence to offer.