sick chick suggestions?

I was *gifted* a sick chick, with a black bulging navel. Clearly Omphalitis after a quick google search. She cries endlessly, walks a little bit. Hasn’t eaten or drank. Should I give her water/pedialyte with a dropper? Or learn how to do subcutaneous fluids? What about getting her to eat? Her...

This nearly six-week-old chick was noticed almost completely limp in brooder pen six days ago. It was given a cocktail of tetracycline, Recover 911 (electrolyte, probiotic, prebiotics + oregano) and Rooster Booster liquid B-12 plus vitamin K one time. It was given the same cocktail less the...