This can’t be true, right? First raptors and now this…
Prepare to be mind-blown! ;p
It’s a possible theory.
Quill feathers have been found on the backs of ceratopsian relatives, like the Psittacosaurus. It had bristles down its back.
This makes it very possible for Ceratops like Triceratops to have bristles.
But, what about a whole coat?
We honestly have no idea. But, in cold regions, they might have needed more insulation. The picture on the very top is of Pachyrhinosaurus, which lived in the cold.