Sorry I haven't been on much today, but it does look like a small prolapsed vent. Preparation H (witchhazel) or honey can be applied to it to reduce swelling. You can try pushing it back inside with a gloved finger, and holding it there for a few minutes. Sometimes these chicks don't make it, but sometimes they do. Here is a good thread about this: https://www.backyardchickens.com/t/857614/help-prolapsed-vent-chickcould you please check out the pics I just posted