I do not know if this would work for you. But when I need a small eye for a bird or animal I have used the small pins with the round plastic tops used in sewing. They come in a number of colors and sizes. I drill a hole just a little bit smaller than the size of the pin head with a round burr. Then snip the pin about a1/4 inch from the head. Put a touch of glue on the back and push it in. The pin holds it in place as the glue dry's . I mostly use black adding a touch of paint for the center of the eye. Works well with basswood and other soft woods. It is not as good with hard woods.