I agree - just because something is struggling doesn't mean it shouldn't get a shot at life. I would separate the chick as it might get picked on or trampled by the others. Give it a small area so it doesn't have to wander far to get food. Make sure it has a heat lamp at the appropriate temp. Maybe put a stuffed animal in the brooder to keep it company. I heard about the idea of putting some form of texture on the floor that will lead the chick to the water and feed. This was used for a blinding gorilla. It may not help, but it's worth a shot. Every hour or so, help the chick walk over the textured padding that leads to the feed and water. Dip its beak in the water and food to make sure it eats/drinks. Doing this repeatedly should train the chick to learn that when it feels that texture, it's near feed/water. It will probably be hard for the chick to live outside one day, so you might need to be alright with an indoor chicken. Chicken diapers can prevent it from making a mess indoors. Good luck! You ca do this!