Sorry for both losses. I would hire you to be my caretaker. You did all you could. Better luck with the next set of twins. Will be a hot thread, just from the looks of this one. Keep up with which hen laid double yolk, maybe you will get some more.
I agree. Water for sure. And nutrients. Might be able to get right nutrients into water. Put in dropper and administer. Find Sally Sunshine or go to forms, search for topic, then look and see if any threads are applicable. Getting the folks on here to just respond with info helps the most...
There is lots of info on site about assistance. Go to Incubating, hatching with friends. Originally started by Sally Sunshine. I see she has already posted in your thread. Thank you for photos.
Keep us posted.
:fl