Not moths. Carpet beetle larvae. Ever take an old T shirt out of the bottom of a drawer, and it's full of little holes?
They love horn, felt, wool, and will eat cotton and antler. Frequent inspection will prevent them, as will insecticides.
To a lesser extent oils like WD 40 repel them.
When I use antler, quite often I color it with potassium permanganate and sometimes dyes. I then spray it with Krylon clear acrylic to seal the color in. Then, I sand and polish the high spots-leaving color contrast. The acrylic is not necessary, but it helps keep the coloration in the low spots.