I have a request for a wedding cake with a feather fascinator attached to the side. Would I treat this as I would a small spray of flowers and use a flower spike? Any ideas on where to purchase feathers? It's not only one but a cluster of them.
You can buy them at Michaels. They've got a section for making hairbands.
Another option would be to buy a hairband that had the feather arrangement that you wanted (or ask the bride to buy one). Then remove the hairband, attach a piece of wire, insert the wire in a straw, and just stick the straw in the cake.