Rabbits: How to Sex Your Bunnies First, place the bunny in your lap on its back with it's head toward your body. This position will keep them subdued while you check. Place a finger on each side of the genitals and and slide the skin away from genitals. This exposes the genitals and will clearly show a slit on the does. Do the same with the bucks. Slide the skin gently away from the genitals and a round hole shows a penis popping up. And on older bucks you can see the beginnings of the testicles. Good fur and good eating!