try to dip the beak every couple of hours
and it depends what electrolytes you are giving, if pedialyte or gatorade make that their only water source for a couple days
not really, it should dry up and fall of in the next few days, just make sure it is just umbilical and not intestines, try to make sure it doesnt get caught on anything because that could pull out intestines, you could put a small band-aid over it to keep it safe