I'm betting hen, comb is small for that age for a roo. My RIR pullets combs are red too. Check the back for saddle feathers coming in they will very dark and on both sides of the spine. You should see two rows of dark pin feathers if it is a roo.
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.