I think you did everything right, now only time will tell. The only other thing you could do to aid in recovery is put her in a small box with one chick in the same area close to the heat. Make sure they have water and food, but, make sure they cannot get wet again. One good way to prevent chicks from getting wet is place the waterer on top of a two by four and don't leave any wood sticking out from beneath the wartere. The chicks will have to stand and extend their neck to drink and they will not get high enough to slip and fall inside the warterer. Good luck!