Cruel is keeping the thing alive any longer. Most likely the bird will not be able to walk, won't be able to feed itself and is partially blind. These are three things that all chickens need to survive. Even the hen knew this and didn't want to care for it.
Wherever else it goes, it will...
http://books.google.com/books?ei=Rt3WUYiQNc2g4AP3o4CICg&id=rAYYAQAAIAAJ&dq=american+standard+of+perfection+poultry&jtp=210#v=onepage&q&f=false
APA Sanctioned shows (you fair may not be) use the Standard of Perfection as the guide for judging. Both your Sussex and Partridge Rock are...
It's not too late. You can send in your entry form, then as long as you get your test done before the show you will be fine. The rules can be a little intimidating, but really they are simple.
Check the listing for your state on this list...
That darker colored bird is a male. No such thing as red pencilled. Sometimes people cross breed and make up names. The orange ones will remain mostly orange, with a little pattern on the wings. The one on the left appears to be female. Check the photos in this thread link below, from Aug 16...
Nice width from front through to the tail. This is what you want. This is something that is desirable all breeds. It is obvious from the photo that this is a bird of great substance.