I was cleaning up poo from 1 of my 11 day old chicks when I noticed that his/her vent was a bit different from the others. No other issues that I'm seeing other than really bad poop build up. It looks like the vent is pointing down. Is this something the chick will grow into or could it be a forever issue of when s/he poops it'll stick to its feathers. I've read about a little apple cider vinegar in their water. Will that hurt the others that don't have pasty butt? I've another who's little rear looks similar, but not as pronounced. Makes me wonder if they could be boys & their vent is like this to make it easier for them with the girls. The pic is just after washing the poop off. I did put a little petroleum jelly on it in hopes that it'll help. Thank you all so much! I'm full of immense gratitude for any & all help with all of my questions. You guys are awesome.