@tjs22 Where are you located - to me his comb and wattle coloring is from frostbite - does he have any toes that are turning black too?Here are some pics. He seems to be making progress and is eating a tiny bit. Turns out he is loaded with mites. I have elector PSP on hand so will deal with that promptly. His eye is also shut. I think his eye lid got pecked. But before isolation his eye was opened, so I think his actual eye ball is OK. Anything I should do to it?
I agree with @oldhenlikesdogs he looks sick instead of beaten and the poop is questionable too. Could be from the mite infestation and not eating properly. I would also get him on some poultry vitamins for several days in a row, then once a week to see if that will bolster him up. A teaspoon of beef liver a day would be good too since he was infested - extra protein along with essential vitamins and nutrients.
Thanks for the photos please keep us posted.
@Sinful chick it's good that your boy is drinking! If he cannot pick up food, but will take applesauce, try offering him wet chicken feed - applesauce is fine as a treat, but it doesn't have the nutrition a recovering rooster needs. You can even add a little of the applesauce to the wet feed to make it more tasty for himMy boy is drinking alot of water (via spoon) , but little food....can't peck...eating alot of applesauce, but no grain, etc. I do have the electrolites for his water. He stands, but falls over easily.

Let us know how he's doing.