Does Gene Shalit wear a wig?

I think it’s pretty clear that at 77, his hair is no longer it’s natural color. It doesn’t even look like a natural color any more. But my wife insisted that it wasn’t even real. As far as I know though, his hair has always been that style. I don’t think it is a wig, but if it is, has it always been a wig? If not, when did the transition occur?