Just got our new chicks the other day. All seem healthy, though one does seem to be the runt of the bunch. 17 total - 6 Leghorns, 6 Light Brahmas, and 5 Buff Orpingtons The one little gal did have pasty butt and I used a warm damp cloth to clean that up. I did notice something underneath the pasty butt. Not being too keen on chicken anatomy, I figured I post a question, along with my ignorance. What is this? It is below the picky vent that I cleaned up.