Most electrolytes have vitamins in them--that may be why the water is yellow. Just read the package ingredients. I would also put a small bowl of plain water in in case they don't like the flavored water. When they are drinking well and eating, they can be stopped.
Honey is considered good, but I would rather use plain triple antibiotic/neosporin on a wound twice a day, since most of us have that at home, or Vetericyn which can be expensive.
When she is feeling better and healing, you may want to try again more slowly at integrating them into the flock. It is best done in a large dog crate with food and water for a fews days to a week, in the coop with the others so they can get used to each other. Then some supervised free ranging about an hour before they normally go to roost works. Hopefully, these two hens will fit in, but at least they will be together. Good luck.