Swollen abdomen, not pasty butt.

[chickenscratchhomestead]

Had a chick hatch 3 days ago now that came from an oversized egg, I don't normally set these but hubby was asking if twins were possible and i explained how it's rare bla bla bla. Well this egg had 2 yolks when candled but hatched 1 chick with no extra yolk or embryo. Just a a single extra lage chick. The chick, still 3 days later, has a very large abdomen practically swollen, very soft! It is so large infact that the chick is unable to walk and has caused some issues with the feet. Ill attach some pictures for help on trying to figure out what is going on, i feel like the chick somehow got both yolks but that does not make sense with how that works. The vent is clean so it is NOT PASTY BUTT. I have done my best to get pics but they really don't do it justice. One pic is of the problem chick next to a sibling that hatched about 10 hours prior to it. Remember this is 3 days later the yolk used to sustain the chick should really be digested.
Im at a loss, it has also regressed to the point it will not open its eyes. Perhaps the intestines did not form correctly?

 

[Wyorp Rock]

it has also regressed to the point it will not open its eyes. Perhaps the intestines did not form correctly?View attachment 1763592

Is the navel healed over?
Can it poop?
I would take a guess that the chick has an infection like Omphalitis (Mushy Chick Disease), but it's hard to know, could be that the cause is abnormal internal development.

If the chick is suffering, which it sounds like it is, kindly put it out of it's misery.