Jackie, I usually get in trouble when I talk technique, but I thought I would chime in. I am a bit looser than many when I think of techniques. I believe the Italian companies are, as well. Fenicio refers to applying filaments of glass to the outside of a vessel or sculpture, then pulling the filaments in loops in some manner -- how, I don't know (I wonder if this is done with a mold.). Zebrati refers to applying glass in a continuous concentric swirl to get a striped appearance. Putting the two together, I can envision the glass maker applying the filaments of glass in a continuous spiraling fashion (zebrati) to the outside, then forming the fenicio loops. When I first learned about fenicio, I thought it was strictly a fasce (on the surface), but I see many cased things that are called fenicio. So I have loosened my strict definition of what fenicio is.
I have pictures of a couple of doves like this that are signed "Fabio Tosi." This is not contradicting Cenedese, just adding some information. Apparently Fabio Tosi designed them for Cenedese.