Help! Potential unabsorbed yolk sac on chick!

[OpheliaM]

One chick hatched very quickly on day 20 (yesterday) and came out with a large red ball on his/her back side area. This has now turned into a sort of red tail. It was bleeding but now it has stopped and turned into an almost dark red colour. He or she dragging it around behind them. What should we do/expect? I've attached some images below!

 

[OpheliaM]

another point, we have one other healthy chick which we've popped in the brooder (they hatched at about the same time yesterday). Should we put them in there with them as they've nearly dried off?

 

[NiteHawk]

no idea what is happening, but maybe put it in a drinking cup and put under a heat lamp, so it cannot run around and pull its innards out.. that is UGLY with a bad belly button, and give it a chance....